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: ['1251', '4849', 'g', 'K', 'b', '9267', '2753', '5489', '8711', 'y', 'Q']

1251, 4849, 7, 11, 2, 9267, 2753, 5489, 8711, 25, 17