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: ['a', 'a', 'k', 'o', 'C', 't', 'w', 'c', '9925', 'z', '5015', '6065']

1, 1, 11, 15, 3, 20, 23, 3, 9925, 26, 5015, 6065