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: ['a', 'K', '9581', 'v', 'p', 'I', '2579', '7467', '2267', '3839', '9615', 'k', 'l', 'X', 'I']

SOLUTION: 1, 11, 9581, 22, 16, 9, 2579, 7467, 2267, 3839, 9615, 11, 12, 24, 9

PROBLEM: ['S', '6599', 'i', 'u', '7321', '859', '171', '7539', 'u', 'q', 'Y', '5699', '5409', 'C', '2885', '8065', '4941', '5981']

SOLUTION: 19, 6599, 9, 21, 7321, 859, 171, 7539, 21, 17, 25, 5699, 5409, 3, 2885, 8065, 4941, 5981

PROBLEM: ['r', '1395', 'E', 'n', 'C', 'L', '2767', '9503', 'h', '4837', 'B', 'h', '7979', '2923', 'b', '5501', 'M', '9741', 'Y', '2587', '9373', '4759', 'i', '3745']

SOLUTION:
18, 1395, 5, 14, 3, 12, 2767, 9503, 8, 4837, 2, 8, 7979, 2923, 2, 5501, 13, 9741, 25, 2587, 9373, 4759, 9, 3745