bug on return -1 - python coding challenges - Py.CheckiO

bug on return -1

When i try to return -1, it doesn't do it..

From: http://www.checkio.org/mission/index-power/solve/

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Created at: Dec. 22, 2015, 7:26 p.m.; Updated at: Dec. 22, 2015, 8:53 p.m.

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