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', 'D', '6375', '59', '8823', 's', '2591', '3923', '351', 'z', 'm', '1257', '1239', 'm', '2945', 'E']

SOLUTION: 19, 4, 6375, 59, 8823, 19, 2591, 3923, 351, 26, 13, 1257, 1239, 13, 2945, 5

PROBLEM: ['3723', '9019', '1475', '229', '2961', '2131', 'B', '2245', 'o', '2299', 'R', '8165', 'v', 'Q', '501', 'L', '6203', 'y', 'r', 'u', '327', '617', 'z', '3843', 'D', '5647', 'Y', 'f', '4809']

SOLUTION: 3723, 9019, 1475, 229, 2961, 2131, 2, 2245, 15, 2299, 18, 8165, 22, 17, 501, 12, 6203, 25, 18, 21, 327, 617, 26, 3843, 4, 5647, 25, 6, 4809

PROBLEM: ['857', 'A', '2749', 's', 'j', 'N', 'y', '1609', '199', '9527', '2483', '9169', 'e', '9755', 'U', 'z', 'y', 'N', '3463', '2405', 'z']

SOLUTION:
857, 1, 2749, 19, 10, 14, 25, 1609, 199, 9527, 2483, 9169, 5, 9755, 21, 26, 25, 14, 3463, 2405, 26