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: ['W', 'A', '4455', '9201', 'B', '2315', '2057', '5139', 'f', 'M', 'l', 'h', '5639', 'd', '125', '5483', 'I', '6603', '4363', 'B', 'O', 'z', '6093', 'x', 'p', '6141', '5013', 'n', 'W', '1603']

SOLUTION: 23, 1, 4455, 9201, 2, 2315, 2057, 5139, 6, 13, 12, 8, 5639, 4, 125, 5483, 9, 6603, 4363, 2, 15, 26, 6093, 24, 16, 6141, 5013, 14, 23, 1603

PROBLEM: ['9007', '1763', '6967', '4893', 'Z', '993', 'M', '8521', 'I', 'Z', '735', 'L', 'M', '1811', 'n', 'S', 'U', 'S', '4891', '3915']

SOLUTION: 9007, 1763, 6967, 4893, 26, 993, 13, 8521, 9, 26, 735, 12, 13, 1811, 14, 19, 21, 19, 4891, 3915

PROBLEM: ['o', '8847', 'z', 'p', '707', '6917', '2251', 'P', 'W', '1371', '8065', 'l', 'O', '1737', '3839', '85', '3885', 'M', '6597', 'S', '2179', 'Q', 'V', 'T', 'i', 'Q', 'B', 'p', 'i', 'C', '5623', '9617', 'u', '5701', 'u', 'U', 'I', 'y']

SOLUTION:
15, 8847, 26, 16, 707, 6917, 2251, 16, 23, 1371, 8065, 12, 15, 1737, 3839, 85, 3885, 13, 6597, 19, 2179, 17, 22, 20, 9, 17, 2, 16, 9, 3, 5623, 9617, 21, 5701, 21, 21, 9, 25