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: ['7047', '7299', 'B', 'X', 'g', '6321', '7457', '8371', 'O', '2401', '9157', '3153', '7095', '7425', '1421', 'i', 'Z', 'x', 'J', '3759', '4125', 'p', '5219', '5481', 'D', 'F', 'f', 'l', 'l', '2283', '6393', '8593', '9267', '7223']

7047, 7299, 2, 24, 7, 6321, 7457, 8371, 15, 2401, 9157, 3153, 7095, 7425, 1421, 9, 26, 24, 10, 3759, 4125, 16, 5219, 5481, 4, 6, 6, 12, 12, 2283, 6393, 8593, 9267, 7223