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: ['4345', '1815', '7973', '6187', 'U', '1133', '8791', '3555', 'i', 's', 'L', 'm', '7695', 'A']

SOLUTION: 4345, 1815, 7973, 6187, 21, 1133, 8791, 3555, 9, 19, 12, 13, 7695, 1

PROBLEM: ['J', '8585', 'T', '9947', '2275', '7577', '7651', '4841', '9491', 'N', '8437']

SOLUTION: 10, 8585, 20, 9947, 2275, 7577, 7651, 4841, 9491, 14, 8437

PROBLEM: ['615', 'R', '7643', '9401', 'R', '3937', 'B', 'S', 'H', '3967', '1853', 'V', 'i', '3935', 'U', 'U', '9079', '1853', 'G', 'W', 'H', 'v', '8207', '9785', 'D', 'G', 'r', 'L', 'c', 'q', 'n', 'Y', 'p', '823', 'g']

SOLUTION:
615, 18, 7643, 9401, 18, 3937, 2, 19, 8, 3967, 1853, 22, 9, 3935, 21, 21, 9079, 1853, 7, 23, 8, 22, 8207, 9785, 4, 7, 18, 12, 3, 17, 14, 25, 16, 823, 7