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: ['5069', 'T', 'I', 'N', 'C', 'l', '7405', '7625', 'V', '8569', '41', '7275', 'V', 'F', '7775']

5069, 20, 9, 14, 3, 12, 7405, 7625, 22, 8569, 41, 7275, 22, 6, 7775