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: ['3839', 'z', 'y', 'T', 'v', 'w', '2469', '2651', '499', '7407', 'O', 'Q', 'e']

SOLUTION: 3839, 26, 25, 20, 22, 23, 2469, 2651, 499, 7407, 15, 17, 5

PROBLEM: ['T', '8333', 'C', '829', 'O', '8213', 'x', '5813', 'D', '7915', '6695', '6985', '667', 'R', '8127', '791']

SOLUTION: 20, 8333, 3, 829, 15, 8213, 24, 5813, 4, 7915, 6695, 6985, 667, 18, 8127, 791

PROBLEM: ['U', '8185', '295', 'p', '4913', '4565', 'M', '721', 'C', 'Q', '2607', 'w', '1631', '8259', 'j']

SOLUTION:
21, 8185, 295, 16, 4913, 4565, 13, 721, 3, 17, 2607, 23, 1631, 8259, 10