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: ['1165', '4381', 'Y', 'r', '7065', '2531', '4915', '7845', '5053', 'a', 'z', '3885', 'm', 'r', 'P', 'S', '3859', '5989', 'T', 'u', 'y', '5635', 'g', '785', '1161']

1165, 4381, 25, 18, 7065, 2531, 4915, 7845, 5053, 1, 26, 3885, 13, 18, 16, 19, 3859, 5989, 20, 21, 25, 5635, 7, 785, 1161