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: ['6089', 'V', 'E', 't', 'U', '9751', 'p', 'D', '7469', 'E', 'K', '6729', '2613', '4573', 'j', '5065', '8639', 'U', 'a', 'Q', '1559', '195', 'l', '6627', 'I', '8409', '899', 'u', '3717', 'W', '7347']

6089, 22, 5, 20, 21, 9751, 16, 4, 7469, 5, 11, 6729, 2613, 4573, 10, 5065, 8639, 21, 1, 17, 1559, 195, 12, 6627, 9, 8409, 899, 21, 3717, 23, 7347