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: ['i', 'V', 'k', '1119', '3587', 'z', 'O', '7639', 'g', 'd', '5939', '1273', '7479']

9, 22, 11, 1119, 3587, 26, 15, 7639, 7, 4, 5939, 1273, 7479