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: ['O', '6049', '4915', '1573', '719', '2061', 'O', 'n', '6689', 'J', '4985', 'r', 'q', '6617', 'k', '2333', '183', '4549', '6053', '1075', '737', '6465', '5421']

SOLUTION: 15, 6049, 4915, 1573, 719, 2061, 15, 14, 6689, 10, 4985, 18, 17, 6617, 11, 2333, 183, 4549, 6053, 1075, 737, 6465, 5421

PROBLEM: ['v', 'b', '6283', 'n']

SOLUTION: 22, 2, 6283, 14

PROBLEM: ['3057', '9225', 'S', 'E', 'U', '5277', '8607', '1039', 'K', '2635', '9031', '3971', '6325', '9121', '4389', 'Q', '5255', '5059', 'p', 's', 'C', 'O', '4283', 'V', 'M', '8875', '8157', '8075', '3165', 'X', '4609', '3787', '4121', 'U', '9585', 'Z', '9577', 'L']

SOLUTION:
3057, 9225, 19, 5, 21, 5277, 8607, 1039, 11, 2635, 9031, 3971, 6325, 9121, 4389, 17, 5255, 5059, 16, 19, 3, 15, 4283, 22, 13, 8875, 8157, 8075, 3165, 24, 4609, 3787, 4121, 21, 9585, 26, 9577, 12