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: ['9389', 'u', '57', '8135', '2025', '315', 'Y', '3831', '6099', 'g', '8331', 'Q', '6791', 'L', '1677', '6559', '5357', '3563', '4927', '9493', 'b', '2669', 'g', '1077', 'H', 'G', '3801', '5735', '4825', 'G', 'k', '217', 'c', 'H', 'T', 'e']

9389, 21, 57, 8135, 2025, 315, 25, 3831, 6099, 7, 8331, 17, 6791, 12, 1677, 6559, 5357, 3563, 4927, 9493, 2, 2669, 7, 1077, 8, 7, 3801, 5735, 4825, 7, 11, 217, 3, 8, 20, 5