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CodingBat code practice

Python > List-1 chance

Basic python list problems -- no loops.. Use a[0], a[1], ... to access elements in a list, len(a) is the length.

 first_last6 H  same_first_last H  make_pi
 common_end sum3 rotate_left3
 reverse3 max_end3 sum2
 middle_way make_ends has23

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