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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def migrator(state):
 """Tweaks will be lost for Cleverbot and its conversations."""

    for tweak in ('tweak1', 'tweak2', 'tweak3'):
        del state[0][tweak]
        for convo in state[1]:
            if tweak in convo:
                del convo[tweak]
    return state