Sum Consecutives Sum Consecutives
Elementary+
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You are given a list that contains solely integers (positive and negative). Your job is to sum only the numbers that are identical and consecutive.

Input: a list.

Output: an iterable.

Example:

sum_consecutives([1, 1, 1, 1]) == [4]
sum_consecutives([1, 1, 2, 2]) == [2, 4]