TASK DEFINITION: In this task, you are given inputs i and A, where i is an integer and A is a list. You need to list all the elements of A preceding the last i elements. i will always have a value less than the length of A.
PROBLEM: 1, ['U', '2255', 'z', 'u', '3111', 'b', 'V', 'K', 'u', 'x', '8193']

SOLUTION: U, 2255, z, u, 3111, b, V, K, u, x

PROBLEM: 6, ['K', '3083', '3121', '2705', 'z', 'm', '3911', 'L', '3587', '9209', 'B', 'I', '4555', '2721', '7415', '9423', 'q', 'D', 'K', 'E', '5119', '7613', 'J', 'R']

SOLUTION: K, 3083, 3121, 2705, z, m, 3911, L, 3587, 9209, B, I, 4555, 2721, 7415, 9423, q, D

PROBLEM: 1, ['9155', '4021']

SOLUTION:
9155