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', 'w', '4763', '5533', 'E', 'M', '2153', '7601', '1653', '3299', 'z', 'y', 'A', '6069', 'S', 'R', '1787', 'e', '9631', 'K', '3995', 'J', '3457', '6927', 'L', '9819']

5, 23, 4763, 5533, 5, 13, 2153, 7601, 1653, 3299, 26, 25, 1, 6069, 19, 18, 1787, 5, 9631, 11, 3995, 10, 3457, 6927, 12, 9819