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: ['7863', '3511', 'd', '7441', 'X', 'n', '8585', 'm', 'L', '5957', 'o', '9243', 'C', '6661', 'b', 'M', 'Z', '4245', '243', 'S', 'K', '2689', 'r', '3611', 'Z', 'p', 'N', 'm', '9897', '6709', '3291', 'z', 'D', '8969', 'q', '8611', '9611']

7863, 3511, 4, 7441, 24, 14, 8585, 13, 12, 5957, 15, 9243, 3, 6661, 2, 13, 26, 4245, 243, 19, 11, 2689, 18, 3611, 26, 16, 14, 13, 9897, 6709, 3291, 26, 4, 8969, 17, 8611, 9611