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: ['C', '6773', '7745', 'E', 'E', '4117', 'g', 'A', 'p', 'K', 'F', 's', '9661']

3, 6773, 7745, 5, 5, 4117, 7, 1, 16, 11, 6, 19, 9661