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: ['8571', '5873', 'g', 'x', '6463', '4415', '5463', '4473', '5955', '7481', '2327', 'n', 'e', '9767', 'f', 'X']

8571, 5873, 7, 24, 6463, 4415, 5463, 4473, 5955, 7481, 2327, 14, 5, 9767, 6, 24