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: ['8979', 'o', '2143', '2267', 't', '1387', '887', 'M', 'u', '2767', '5621', 'j', 'k', '5665', 'X', 'k', '4173', 'Q', '3789', 'V', '6719', '9305', '1397', 'f']

8979, 15, 2143, 2267, 20, 1387, 887, 13, 21, 2767, 5621, 10, 11, 5665, 24, 11, 4173, 17, 3789, 22, 6719, 9305, 1397, 6