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: ['r', '9885', '189', 'c', 'h', '1633', '2863', 'D', 'K', '9195', 'M', 's', 'w', '2359', '6173', 'n', '7537', 'q', 'i', '975', 'B', '7973', 'l', '863', 'p', '6061', '3871', 'M']

18, 9885, 189, 3, 8, 1633, 2863, 4, 11, 9195, 13, 19, 23, 2359, 6173, 14, 7537, 17, 9, 975, 2, 7973, 12, 863, 16, 6061, 3871, 13