TASK DEFINITION: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
PROBLEM: ['3515', '5271', '4907', '4935', '7597', '5125', 'g', '8455', 'j', 'Y', '4277', '9577', 'W', '5615', 'u', 'r', '5171']

SOLUTION: 3515, 5271, 4907, 4935, 7597, 5125, 7, 8455, 10, 25, 4277, 9577, 23, 5615, 21, 18, 5171

PROBLEM: ['1979', '9217', '4309', '4071', 'w', 'P', '5303', 't', 'g', 'q', 'X', '9773', 'T', '2279', '1211', '9503', '5667', 'O', 'P', '3685', '2417']

SOLUTION: 1979, 9217, 4309, 4071, 23, 16, 5303, 20, 7, 17, 24, 9773, 20, 2279, 1211, 9503, 5667, 15, 16, 3685, 2417

PROBLEM: ['5089', '9637', 'E', '729', 'x', 'J', '2031', 'I', '565', '3755', '3457', 'N', 'l', 'c', 'X', '1659', 'c', '3319', '3411', 'R', '61', '2213', 'W', 'h', '5811', 'C', '2897']

SOLUTION:
5089, 9637, 5, 729, 24, 10, 2031, 9, 565, 3755, 3457, 14, 12, 3, 24, 1659, 3, 3319, 3411, 18, 61, 2213, 23, 8, 5811, 3, 2897