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: ['Q', '4157', '8935', '4533', '4179', 'R', '4765', 't', '7323', '6175', 'w', '291', '6701', 'Q', '3979', 'O', 'N', 'F', '7759', 'b']

17, 4157, 8935, 4533, 4179, 18, 4765, 20, 7323, 6175, 23, 291, 6701, 17, 3979, 15, 14, 6, 7759, 2