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: ['r', 'X', '9099', '4213', '2837', '219', 'F', '6667', 'p', '7045', '5235', '5873', 'b', '9751', 'S', 'S', '8831', '4185', 'w', 't', '2213', 'm', '2967', 'g', '3863', '4693', 'z', '747', '8909']

18, 24, 9099, 4213, 2837, 219, 6, 6667, 16, 7045, 5235, 5873, 2, 9751, 19, 19, 8831, 4185, 23, 20, 2213, 13, 2967, 7, 3863, 4693, 26, 747, 8909