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: ['687', '5759', 'J', 'h', 'G', 'l', 'k', 'M', 'n', 'f', '6001', '6395', 'W', '8233', '1073', '7423', '9845', '227', '6881', '7707', 'j', '2167', '6467', 'U', '113', 'A', 'p']

687, 5759, 10, 8, 7, 12, 11, 13, 14, 6, 6001, 6395, 23, 8233, 1073, 7423, 9845, 227, 6881, 7707, 10, 2167, 6467, 21, 113, 1, 16