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: ['H', '7595', 'X', 'C', '7185', 'f', 'R', 'W', '309', '8821', 'R', '8863', 'm', 'D', '7863', '9385', 'Y', '9175', '7355', 'G', '8603', 'l', '7807', '981', 'k', '7575']

8, 7595, 24, 3, 7185, 6, 18, 23, 309, 8821, 18, 8863, 13, 4, 7863, 9385, 25, 9175, 7355, 7, 8603, 12, 7807, 981, 11, 7575