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: ['8739', 'a', 'v', '9913', '2577', '4621', 'Z', 'm', 't', '2169', 'N', '8623', 'Q', '7675', '6017', '4497', '7053', 'L', '325', '6777', '4827', '1601', 'X', '6735', '5465', 'e', 'E', 'k', 'A', '6377']

8739, 1, 22, 9913, 2577, 4621, 26, 13, 20, 2169, 14, 8623, 17, 7675, 6017, 4497, 7053, 12, 325, 6777, 4827, 1601, 24, 6735, 5465, 5, 5, 11, 1, 6377