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: ['g', 'U', '5709', 'g', 'v', '185', 'y', 'K', 'J', '889', 'e', 'B', '2345', 'j', 'm', 'Y', 'b', '5849', 'z', 'G', '733', 'J', 'C', 'Z', '3', '5733', '4563', 'Y', '1273', '5671', 'S', 'M']

7, 21, 5709, 7, 22, 185, 25, 11, 10, 889, 5, 2, 2345, 10, 13, 25, 2, 5849, 26, 7, 733, 10, 3, 26, 3, 5733, 4563, 25, 1273, 5671, 19, 13