Question: Given 2 arrays of ints, a and b , return True if they have the same first element or they have the same last element.

Given 2 arrays of ints, a and b, return True if they have the same first element or they have the same last element. Both arrays will be length 1 or more.
common_end([1,2,3],[7,3])-> True
common_end([1,2,3],[7,3,2])-> False
common_end([1,2,3],[1,3])-> True

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