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: ['1801', '667', 'e', 'U', 't', '6309', '5535', 'g', '3007', 'g', 'y', '7329', '3741', 'f', 'O', 'i', 'T', 'p', '685', 'u', 'q', '8561', 'Z']

SOLUTION: 1801, 667, 5, 21, 20, 6309, 5535, 7, 3007, 7, 25, 7329, 3741, 6, 15, 9, 20, 16, 685, 21, 17, 8561, 26

PROBLEM: ['P', 'P', '1043', 'q', 'O', '295', '8991', 'l', 'L', '6227', 'x', '6161', 'p', '9621']

SOLUTION: 16, 16, 1043, 17, 15, 295, 8991, 12, 12, 6227, 24, 6161, 16, 9621

PROBLEM: ['2831', 'N', 'X', '1349', 'K', 'j', '8271', 'v', 'o', 'z', 'r', 'W', '6837', 'q', '4813', 'G', 'k', 'R', '1255', '503']

SOLUTION:
2831, 14, 24, 1349, 11, 10, 8271, 22, 15, 26, 18, 23, 6837, 17, 4813, 7, 11, 18, 1255, 503