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: ['3695', '7849', '4673', 't', 'A', '8893', 'g', 'H', '2929', '4763', '4947', 'O', '7223', '8855', '7077', '9663', '4483', '6549']

3695, 7849, 4673, 20, 1, 8893, 7, 8, 2929, 4763, 4947, 15, 7223, 8855, 7077, 9663, 4483, 6549