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, ['5091', 'B', 'f', '6415']

SOLUTION: 5091, B, f

PROBLEM: 4, ['R', 'U', 'W', '403', '8287', 's', '8495', 'x']

SOLUTION: R, U, W, 403

PROBLEM: 10, ['N', 's', '1673', '3767', 'Z', '6387', '2797', 'd', '657', '4581', 'G', 'a', 'h', '1027', 'B', 'e', '355', 'U', '921', 'k']

SOLUTION:
N, s, 1673, 3767, Z, 6387, 2797, d, 657, 4581