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: ['9409', '5955', '9349', '8275', '3975', 'c', 'v', 'L', '1561', 'f', 'p']

SOLUTION: 9409, 5955, 9349, 8275, 3975, 3, 22, 12, 1561, 6, 16

PROBLEM: ['2621', '8811', '3613', '7469', 'O', 'P', '3429', '6091', 'l', '6905', '8189', '8933', 'l', '1745', 'c', 'a', '8665', '9733', '8263', 'X', '5065', 'W', '1837', 'K', 'k', '519', '7623']

SOLUTION: 2621, 8811, 3613, 7469, 15, 16, 3429, 6091, 12, 6905, 8189, 8933, 12, 1745, 3, 1, 8665, 9733, 8263, 24, 5065, 23, 1837, 11, 11, 519, 7623

PROBLEM: ['X', 'I', 'x', '6887', '4413', 'i', '973', '7905', '7851', 'M', 'b', 'N', 's', 'w', '9777', 'C', '8841', '7661', '4921', '8261', '5539', '6315']

SOLUTION:
24, 9, 24, 6887, 4413, 9, 973, 7905, 7851, 13, 2, 14, 19, 23, 9777, 3, 8841, 7661, 4921, 8261, 5539, 6315