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: ['8121', '9573', 'm', 'f', 'E', 'T', '5545', 'R', 'd', '3121', 'z', '2319', '3081', '129', 'V', 'r', 'b', '551', '905', '2159', 'L', '8507', '4781', 'p', '2257', 'O', 'h', '237', 'w', '5865', '3325']

8121, 9573, 13, 6, 5, 20, 5545, 18, 4, 3121, 26, 2319, 3081, 129, 22, 18, 2, 551, 905, 2159, 12, 8507, 4781, 16, 2257, 15, 8, 237, 23, 5865, 3325