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: 3, ['x', 'y', 'M', '9519', '6553', '7497', 'j', '9587', 'g', '9393', 'C', 'T']

SOLUTION: x, y, M, 9519, 6553, 7497, j, 9587, g

PROBLEM: 4, ['5263', '8669', '8175', 't', 'a', 'c', '217', '891']

SOLUTION: 5263, 8669, 8175, t

PROBLEM: 2, ['M', '1991', 'H', 'o']

SOLUTION:
M, 1991