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: ['c', '1631', 'r', '5243', '319', 'n', 'O', 'd', 'Y', '9085', '1173', '1897', 'C', 'p', 'h', '4995', 'k', 'g', 'A', 'R', 'R', '1', 'j', '7919', '3683', 'n', 'F', '1609', 'n', '3291', '6851']

3, 1631, 18, 5243, 319, 14, 15, 4, 25, 9085, 1173, 1897, 3, 16, 8, 4995, 11, 7, 1, 18, 18, 1, 10, 7919, 3683, 14, 6, 1609, 14, 3291, 6851