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: ['x', '9709', '1533', 'w', 'M', 'z', '7459', '9617', '6763', '729', 'F', '8815', '363', '3349', '5129', 'L', 'L']

SOLUTION: 24, 9709, 1533, 23, 13, 26, 7459, 9617, 6763, 729, 6, 8815, 363, 3349, 5129, 12, 12

PROBLEM: ['3059', '4039', 'c', 'R', '7329', 'm', 'E', 'R', '1231', '6861', '29']

SOLUTION: 3059, 4039, 3, 18, 7329, 13, 5, 18, 1231, 6861, 29

PROBLEM: ['1459', '6319', 'e', 'N', 'n', 's']

SOLUTION:
1459, 6319, 5, 14, 14, 19