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: ['7501', 'c', 'n', '3551', 'U', '8239', 'L', '3149', '9399', 'a', '2763', '2461', 'p']

SOLUTION: 7501, 3, 14, 3551, 21, 8239, 12, 3149, 9399, 1, 2763, 2461, 16

PROBLEM: ['7149', '3915', 'k', 'Y', 'z', 'P', '775', 'v', 'U', '233', 'm', '2939', 'O', '6787', '7717', 'U', '8531', '5071', 'j', '7839', 'S', 'W', 'K', '3689', '8907', '7721', '9099', 'U', 'U', '53', '4025', 'J', '7179', '7587']

SOLUTION: 7149, 3915, 11, 25, 26, 16, 775, 22, 21, 233, 13, 2939, 15, 6787, 7717, 21, 8531, 5071, 10, 7839, 19, 23, 11, 3689, 8907, 7721, 9099, 21, 21, 53, 4025, 10, 7179, 7587

PROBLEM: ['F', '9765', 'N', '2887', 'G', 'S', 'K', 'A', 'o', 'H', 'e', 'E', '573', '6727', 'u', '8415', 'h', '5191', 'E', '9253', 'J', 'z', '6025', '5733', 'J', 'x', 'N', '4475', '6373', 'W', '9255', '8209', '9425', 'j', '5851', '1497', '3519', '3507', '4111', '531']

SOLUTION:
6, 9765, 14, 2887, 7, 19, 11, 1, 15, 8, 5, 5, 573, 6727, 21, 8415, 8, 5191, 5, 9253, 10, 26, 6025, 5733, 10, 24, 14, 4475, 6373, 23, 9255, 8209, 9425, 10, 5851, 1497, 3519, 3507, 4111, 531