Tiny Interpreter

It looked complicated, just ran the interpreter bin it gave the this output seem to be the flag.

I
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p
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r
_
w
r
i
t
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n
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_
C
_
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s
_
a
_
g
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a
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a

Concatenated all the characters to get the flag.

>>> data = open('output', 'rb').read()
>>> b''.join(data.split())
b'Interpreter_written_in_C_is_a_great_idea'