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: ['2495', 'd', 'D', 'u', 'o', '5173', '6503', '5191', '955', '563', 'E', 'x', '6951', '8585', 'a', '761', '8179', 'y', 'p', 'x']

2495, 4, 4, 21, 15, 5173, 6503, 5191, 955, 563, 5, 24, 6951, 8585, 1, 761, 8179, 25, 16, 24