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: ['L', 'q', '4763', 'k', '8517', '9995', '6501', '4827', '7619', 'n', 'm', 'L', 'o', 'C']

12, 17, 4763, 11, 8517, 9995, 6501, 4827, 7619, 14, 13, 12, 15, 3