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: ['9815', '5507', '8181', 'q', 'E', '145', 'r', 'N', 'd', 'w', 'Z', '623', 'F', '5579', 'b', '8803']

9815, 5507, 8181, 17, 5, 145, 18, 14, 4, 23, 26, 623, 6, 5579, 2, 8803