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: ['6551', 'w', '2309', '2797', 'Y', 'Z', 'S', '337', '1043', '2665', 'k', 'S', '2659', '1909', '9747', 'c', '339', '3093', '7565', '5097', 'd', 'g', '165', 'M', '3295', '1585', 'V', '2867', 'a', '9347', 'S', 'j', 'M', 'q', '2665', 'V', 'Z', '4533', 'C', 'M']

6551, 23, 2309, 2797, 25, 26, 19, 337, 1043, 2665, 11, 19, 2659, 1909, 9747, 3, 339, 3093, 7565, 5097, 4, 7, 165, 13, 3295, 1585, 22, 2867, 1, 9347, 19, 10, 13, 17, 2665, 22, 26, 4533, 3, 13