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: ['I', 'm', 'u', 'e', 'G', 'g', 'r', '4579', '9907', 'I', 'U', '6717', 'k', 'R', '7679', 'u', '4625', 'p', '7939', 'J', '2405', 'F', 'I', '7085', 'q', '6465', 'V']

9, 13, 21, 5, 7, 7, 18, 4579, 9907, 9, 21, 6717, 11, 18, 7679, 21, 4625, 16, 7939, 10, 2405, 6, 9, 7085, 17, 6465, 22