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: ['8627', '4673', 'F', 'H', 'S', '1371', 'E', 'y', '4749', '5655', 'v', 'f', '7543', '7257', 'G', 'a', 'y', 'S', '3719', '7839', '8143', 't', 'H', 'S', 'T', 'A', '1881', '5619']

8627, 4673, 6, 8, 19, 1371, 5, 25, 4749, 5655, 22, 6, 7543, 7257, 7, 1, 25, 19, 3719, 7839, 8143, 20, 8, 19, 20, 1, 1881, 5619