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: ['e', 'a', '3337', 'R', 'H']

SOLUTION: 5, 1, 3337, 18, 8

PROBLEM: ['b', 'a', 'v', 'W', 'R', '2221', 'N', '9463', 'Z', 'd', 'u', '9345']

SOLUTION: 2, 1, 22, 23, 18, 2221, 14, 9463, 26, 4, 21, 9345

PROBLEM: ['7725', '3939', '8877', 'h', '4765', '4893', '1879', 'M', '995', '5941', 'M', 'F', 'N', '6433', '9227', '8607', '675', 'L', '8483', 'U', 'd', 'h', 'c', 'F', '8591', 'J', 'B', '7515', 'I', '449', '1', '4557', '4619', 'N']

SOLUTION:
7725, 3939, 8877, 8, 4765, 4893, 1879, 13, 995, 5941, 13, 6, 14, 6433, 9227, 8607, 675, 12, 8483, 21, 4, 8, 3, 6, 8591, 10, 2, 7515, 9, 449, 1, 4557, 4619, 14