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: ['5271', '7677', 'y', 'g', 'h', 'v', 'Q', '331', '9553', 'E', '7457', 'w', '9319', 'j', '4013', 'u', 'i', '1195', '5429', 'D', 'K', '1089', 'c', '1731', 'r', '2243', 'H', 'z', 'r', 'Q']

5271, 7677, 25, 7, 8, 22, 17, 331, 9553, 5, 7457, 23, 9319, 10, 4013, 21, 9, 1195, 5429, 4, 11, 1089, 3, 1731, 18, 2243, 8, 26, 18, 17