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: ['6377', '5683', 'I', 'z', '3349', 't', '5065', 'c', 'A', 'w', 'Y', 'M', '4647', 'v', '4821', '4495', 'a', '9937', '4835', 'E', 'F', 'b', 'g']

6377, 5683, 9, 26, 3349, 20, 5065, 3, 1, 23, 25, 13, 4647, 22, 4821, 4495, 1, 9937, 4835, 5, 6, 2, 7