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: ['1057', 'N', 'k', 'A', 'r', 'C', '3701', 'M', 'R', 'T', '3709', '7417', 'Q', 'B', 't', 'r', '5015', '9139', '9765', '9607', 'A', '4553', '4713', '3361', 'j', '4577', 's']

1057, 14, 11, 1, 18, 3, 3701, 13, 18, 20, 3709, 7417, 17, 2, 20, 18, 5015, 9139, 9765, 9607, 1, 4553, 4713, 3361, 10, 4577, 19