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: ['5455', '3683', 'w', 'q', '3763', 'P', '6397', 'I', 'I', 'H', 'H', 'K', 'c', 'k', 'D', '1495', 'p', '6757', 'q', '7513', '257', 'X', '1949', 'B', 'Z', '8759', '4405', '3531']

5455, 3683, 23, 17, 3763, 16, 6397, 9, 9, 8, 8, 11, 3, 11, 4, 1495, 16, 6757, 17, 7513, 257, 24, 1949, 2, 26, 8759, 4405, 3531