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: ['2685', 'R', '4651', '7471', '3923', 'F', 'q', '769', 'x', 'l', '7113', '1175', '1663', 's', '7785', 'I', 'U', 'w', 'h', 'C', '8891', 'A', 'F', 'Q', '5345', 's', '4691', 'T', '6843', 'l', '2281', 'g', 'n']

2685, 18, 4651, 7471, 3923, 6, 17, 769, 24, 12, 7113, 1175, 1663, 19, 7785, 9, 21, 23, 8, 3, 8891, 1, 6, 17, 5345, 19, 4691, 20, 6843, 12, 2281, 7, 14