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: ['S', '8419', 'p', '2659', 'y', 'e', '3697', '4945', 'S', '6933', 'W', '9691', 'S', '265', 'a', '7625']

SOLUTION: 19, 8419, 16, 2659, 25, 5, 3697, 4945, 19, 6933, 23, 9691, 19, 265, 1, 7625

PROBLEM: ['D', '4525', 'O', 'Y', '3927', '5539', '8589', '1733', 'C', '2841', 'f', '8139', 'q', '8847', '1455', 'B', '5705', '231', '6423', 'T', 'F', '5277', 'h', '55']

SOLUTION: 4, 4525, 15, 25, 3927, 5539, 8589, 1733, 3, 2841, 6, 8139, 17, 8847, 1455, 2, 5705, 231, 6423, 20, 6, 5277, 8, 55

PROBLEM: ['U', 'W', '473', 'T', 'U', 'I', 'M', '4025', '8255', 'z', 'L', '8053', 'H', 'R', '3273', 'p', 'v', 'X', 's', 'O', 'q', '6273', 'M', 'V', '7775', '9025', '2529', 'U', 'a', 'K', 'H', '4521', '1287', 't', 'C', '2621']

SOLUTION:
21, 23, 473, 20, 21, 9, 13, 4025, 8255, 26, 12, 8053, 8, 18, 3273, 16, 22, 24, 19, 15, 17, 6273, 13, 22, 7775, 9025, 2529, 21, 1, 11, 8, 4521, 1287, 20, 3, 2621