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: ['7763', 'W', '6601', 'H', 'B', '2493', 'N', 'Z', 'o', 's', 'Y', '9755', '4663', 'k', '7423', '6225', '8549']

7763, 23, 6601, 8, 2, 2493, 14, 26, 15, 19, 25, 9755, 4663, 11, 7423, 6225, 8549