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: ['2939', '5689', '7929', '2093', '905', 'w', '7651', '6683', '4273', 'l', '7109', 'f']

2939, 5689, 7929, 2093, 905, 23, 7651, 6683, 4273, 12, 7109, 6