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: ['1269', 'L', '7125', 'p', '3025', 'G', 'g', 'Y', '997', '367', '1959', 'G', '1405', '571', '5747', '4895', '5123', 'B', '715', 'P', 't', '3175', '6191', 'r', 'i', 'x', 'r', '3629', 'f', '749']

1269, 12, 7125, 16, 3025, 7, 7, 25, 997, 367, 1959, 7, 1405, 571, 5747, 4895, 5123, 2, 715, 16, 20, 3175, 6191, 18, 9, 24, 18, 3629, 6, 749