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.

['9121', 'x', '3517', '3797', '9865', 'P', '2171', 'a', 'm', 'J', 'f', 'p', '5385']
9121, 24, 3517, 3797, 9865, 16, 2171, 1, 13, 10, 6, 16, 5385

['2729', 'K', '1143', 'g', '3829']
2729, 11, 1143, 7, 3829

['W', 'I', 'w', 'I', 'C', 'm', '7495', 'h', 'O', '6659', 'X', 'H', 'n', '7829']

23, 9, 23, 9, 3, 13, 7495, 8, 15, 6659, 24, 8, 14, 7829