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: ['8913', '7845', '8859', '7121', 'l', 'C', '773', '5885', '5755', '177']

8913, 7845, 8859, 7121, 12, 3, 773, 5885, 5755, 177