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: ['2175', '3719', 'o', 'D', 'z', 'Z', '599', 'w', '4003', '3599', '5821', 'w', 'Y', 'd', '3707', '347', 'E', '9831', '1719', '105', 'a', 'x', '9069']

2175, 3719, 15, 4, 26, 26, 599, 23, 4003, 3599, 5821, 23, 25, 4, 3707, 347, 5, 9831, 1719, 105, 1, 24, 9069