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: 8, ['2657', 'u', '4419', '6719', '7841', 'u', '3781', 'o', 'w', '987', 'd', '1871', '4313', '1025', 'u', '3963', '7743', '1885', 'z', 'z', '7187', '5247']

SOLUTION: 2657, u, 4419, 6719, 7841, u, 3781, o, w, 987, d, 1871, 4313, 1025

PROBLEM: 12, ['G', 'H', 'Z', '5925', '8451', 'T', 'B', '9269', 'k', 'o', '4753', '8041', 'd', 'd', '2141', '9069', '6407', 'x', 'p', 'j', '831', '4615', '5419', 't', '8337', '7403', 'e', '1397', 'F']

SOLUTION: G, H, Z, 5925, 8451, T, B, 9269, k, o, 4753, 8041, d, d, 2141, 9069, 6407

PROBLEM: 12, ['x', 'w', 'n', 'w', 'x', '5767', '845', '8143', 'Q', '3755', 'O', 'y', '9109', 'v', 'T', 'D', 'w', 't', 'T', '8995', '5239', 'n', 'H', '6311']

SOLUTION:
x, w, n, w, x, 5767, 845, 8143, Q, 3755, O, y