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"""

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opcode module - potentially shared between dis and other modules which

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operate on bytecodes (e.g. peephole optimizers).

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"""

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__all__ = ["cmp_op", "hasconst", "hasname", "hasjrel", "hasjabs",

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"haslocal", "hascompare", "hasfree", "opname", "opmap",

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"HAVE_ARGUMENT", "EXTENDED_ARG", "hasnargs"]

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# It's a chicken-and-egg I'm afraid:

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# We're imported before _opcode's made.

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# With exception unheeded

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# (stack_effect is not needed)

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# Both our chickens and eggs are allayed.

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# --Larry Hastings, 2013/11/23

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try:

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from _opcode import stack_effect

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__all__.append('stack_effect')

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except ImportError:

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pass

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cmp_op = ('<', '<=', '==', '!=', '>', '>=')

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hasconst = []

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hasname = []

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hasjrel = []

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hasjabs = []

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haslocal = []

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hascompare = []

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hasfree = []

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hasnargs = [] # unused

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opmap = {}

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opname = ['<%r>' % (op,) for op in range(256)]

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def def_op(name, op):

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opname[op] = name

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opmap[name] = op

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def name_op(name, op):

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def_op(name, op)

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hasname.append(op)

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def jrel_op(name, op):

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def_op(name, op)

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hasjrel.append(op)

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def jabs_op(name, op):

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def_op(name, op)

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hasjabs.append(op)

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# Instruction opcodes for compiled code

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# Blank lines correspond to available opcodes

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def_op('POP_TOP', 1)

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def_op('ROT_TWO', 2)

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def_op('ROT_THREE', 3)

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def_op('DUP_TOP', 4)

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def_op('DUP_TOP_TWO', 5)

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def_op('ROT_FOUR', 6)

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def_op('NOP', 9)

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def_op('UNARY_POSITIVE', 10)

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def_op('UNARY_NEGATIVE', 11)

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def_op('UNARY_NOT', 12)

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def_op('UNARY_INVERT', 15)

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def_op('BINARY_MATRIX_MULTIPLY', 16)

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def_op('INPLACE_MATRIX_MULTIPLY', 17)

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def_op('BINARY_POWER', 19)

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def_op('BINARY_MULTIPLY', 20)

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def_op('BINARY_MODULO', 22)

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def_op('BINARY_ADD', 23)

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def_op('BINARY_SUBTRACT', 24)

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def_op('BINARY_SUBSCR', 25)

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def_op('BINARY_FLOOR_DIVIDE', 26)

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def_op('BINARY_TRUE_DIVIDE', 27)

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def_op('INPLACE_FLOOR_DIVIDE', 28)

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def_op('INPLACE_TRUE_DIVIDE', 29)

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def_op('RERAISE', 48)

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def_op('WITH_EXCEPT_START', 49)

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def_op('GET_AITER', 50)

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def_op('GET_ANEXT', 51)

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def_op('BEFORE_ASYNC_WITH', 52)

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def_op('END_ASYNC_FOR', 54)

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def_op('INPLACE_ADD', 55)

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def_op('INPLACE_SUBTRACT', 56)

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def_op('INPLACE_MULTIPLY', 57)

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def_op('INPLACE_MODULO', 59)

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def_op('STORE_SUBSCR', 60)

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def_op('DELETE_SUBSCR', 61)

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def_op('BINARY_LSHIFT', 62)

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def_op('BINARY_RSHIFT', 63)

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def_op('BINARY_AND', 64)

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def_op('BINARY_XOR', 65)

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def_op('BINARY_OR', 66)

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def_op('INPLACE_POWER', 67)

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def_op('GET_ITER', 68)

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def_op('GET_YIELD_FROM_ITER', 69)

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def_op('PRINT_EXPR', 70)

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def_op('LOAD_BUILD_CLASS', 71)

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def_op('YIELD_FROM', 72)

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def_op('GET_AWAITABLE', 73)

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def_op('LOAD_ASSERTION_ERROR', 74)

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def_op('INPLACE_LSHIFT', 75)

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def_op('INPLACE_RSHIFT', 76)

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def_op('INPLACE_AND', 77)

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def_op('INPLACE_XOR', 78)

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def_op('INPLACE_OR', 79)

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def_op('LIST_TO_TUPLE', 82)

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def_op('RETURN_VALUE', 83)

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def_op('IMPORT_STAR', 84)

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def_op('SETUP_ANNOTATIONS', 85)

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def_op('YIELD_VALUE', 86)

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def_op('POP_BLOCK', 87)

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def_op('POP_EXCEPT', 89)

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HAVE_ARGUMENT = 90 # Opcodes from here have an argument:

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name_op('STORE_NAME', 90) # Index in name list

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name_op('DELETE_NAME', 91) # ""

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def_op('UNPACK_SEQUENCE', 92) # Number of tuple items

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jrel_op('FOR_ITER', 93)

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def_op('UNPACK_EX', 94)

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name_op('STORE_ATTR', 95) # Index in name list

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name_op('DELETE_ATTR', 96) # ""

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name_op('STORE_GLOBAL', 97) # ""

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name_op('DELETE_GLOBAL', 98) # ""

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def_op('LOAD_CONST', 100) # Index in const list

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hasconst.append(100)

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name_op('LOAD_NAME', 101) # Index in name list

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def_op('BUILD_TUPLE', 102) # Number of tuple items

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def_op('BUILD_LIST', 103) # Number of list items

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def_op('BUILD_SET', 104) # Number of set items

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def_op('BUILD_MAP', 105) # Number of dict entries

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name_op('LOAD_ATTR', 106) # Index in name list

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def_op('COMPARE_OP', 107) # Comparison operator

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hascompare.append(107)

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name_op('IMPORT_NAME', 108) # Index in name list

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name_op('IMPORT_FROM', 109) # Index in name list

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jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip

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jabs_op('JUMP_IF_FALSE_OR_POP', 111) # Target byte offset from beginning of code

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jabs_op('JUMP_IF_TRUE_OR_POP', 112) # ""

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jabs_op('JUMP_ABSOLUTE', 113) # ""

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jabs_op('POP_JUMP_IF_FALSE', 114) # ""

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jabs_op('POP_JUMP_IF_TRUE', 115) # ""

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name_op('LOAD_GLOBAL', 116) # Index in name list

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def_op('IS_OP', 117)

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def_op('CONTAINS_OP', 118)

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jabs_op('JUMP_IF_NOT_EXC_MATCH', 121)

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jrel_op('SETUP_FINALLY', 122) # Distance to target address

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def_op('LOAD_FAST', 124) # Local variable number

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haslocal.append(124)

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def_op('STORE_FAST', 125) # Local variable number

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haslocal.append(125)

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def_op('DELETE_FAST', 126) # Local variable number

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haslocal.append(126)

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def_op('RAISE_VARARGS', 130) # Number of raise arguments (1, 2, or 3)

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def_op('CALL_FUNCTION', 131) # #args

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def_op('MAKE_FUNCTION', 132) # Flags

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def_op('BUILD_SLICE', 133) # Number of items

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def_op('LOAD_CLOSURE', 135)

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hasfree.append(135)

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def_op('LOAD_DEREF', 136)

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hasfree.append(136)

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def_op('STORE_DEREF', 137)

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hasfree.append(137)

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def_op('DELETE_DEREF', 138)

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hasfree.append(138)

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def_op('CALL_FUNCTION_KW', 141) # #args + #kwargs

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def_op('CALL_FUNCTION_EX', 142) # Flags

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jrel_op('SETUP_WITH', 143)

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def_op('LIST_APPEND', 145)

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def_op('SET_ADD', 146)

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def_op('MAP_ADD', 147)

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def_op('LOAD_CLASSDEREF', 148)

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hasfree.append(148)

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def_op('EXTENDED_ARG', 144)

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EXTENDED_ARG = 144

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jrel_op('SETUP_ASYNC_WITH', 154)

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def_op('FORMAT_VALUE', 155)

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def_op('BUILD_CONST_KEY_MAP', 156)

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def_op('BUILD_STRING', 157)

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name_op('LOAD_METHOD', 160)

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def_op('CALL_METHOD', 161)

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def_op('LIST_EXTEND', 162)

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def_op('SET_UPDATE', 163)

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def_op('DICT_MERGE', 164)

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def_op('DICT_UPDATE', 165)

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del def_op, name_op, jrel_op, jabs_op

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