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: ['N', '8821', 'U', 'X', 'N', '4125', 's', 'C', '9141']

SOLUTION: 14, 8821, 21, 24, 14, 4125, 19, 3, 9141

PROBLEM: ['y', 'L', '1587', '8235', '4495', '2811', 'J', '4389', 'g', '3171', '2569', 'R', '6057', '6261', 'g', '1081', 'I', '4487', '6809', 'p', 'm', '5991', '625']

SOLUTION: 25, 12, 1587, 8235, 4495, 2811, 10, 4389, 7, 3171, 2569, 18, 6057, 6261, 7, 1081, 9, 4487, 6809, 16, 13, 5991, 625

PROBLEM: ['x', 'S', 'O', 'A', '4611', '7227', 'n', '7449', 'I', 'G', '1127', '4955', '7133', 'Z', '8713', 'b']

SOLUTION:
24, 19, 15, 1, 4611, 7227, 14, 7449, 9, 7, 1127, 4955, 7133, 26, 8713, 2