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: ['m', 'G', 'K', 'h', 'd', 'I', 'M', '6969', 'j', 'R', 'q', '2587', '5563', 'Q', 'P', 'h', '509', '3535', '8269', '7749', 'e', 'f', '7497']

13, 7, 11, 8, 4, 9, 13, 6969, 10, 18, 17, 2587, 5563, 17, 16, 8, 509, 3535, 8269, 7749, 5, 6, 7497