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: ['g', '6227', 'K', 'a', 'Z', '6627', 'n', 'n', 'J', '1753', 'R', 'h', '8255', 'i', 'K', '6319', '7605', '9761', '117', 'U', '1535', 'c', 'f']

7, 6227, 11, 1, 26, 6627, 14, 14, 10, 1753, 18, 8, 8255, 9, 11, 6319, 7605, 9761, 117, 21, 1535, 3, 6