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: ['E', 'z', '945', 'K', '9641', '9401', 'S', 'U', 'g', '5683', 'f', 'F', '7791', 'Y', '2079']

5, 26, 945, 11, 9641, 9401, 19, 21, 7, 5683, 6, 6, 7791, 25, 2079