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.
Input: ['e', '841', 'Y', 's', 'm', 'F', '6617', '1065', '4679', '453', 'x', '9987', '1387', '5647', '3519', '5211', '509', 'o', '1149', 'Z', '8015', '7171', '7181', '8201', 'T', 'W', '2319', '277', '995', 'b', 'E', '6561', 'f', '137']

5, 841, 25, 19, 13, 6, 6617, 1065, 4679, 453, 24, 9987, 1387, 5647, 3519, 5211, 509, 15, 1149, 26, 8015, 7171, 7181, 8201, 20, 23, 2319, 277, 995, 2, 5, 6561, 6, 137