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: ['M', '5671', '5253', '7593', 'v', 'b', 'S', '3231', '509', 'X', '2769', '3875', 'M', 'Y', 'p', 's', 'p', 'q', 'k', '3589', '453', '5049', 'O', 'd', 'y', 'l', '2325', '2313', 'g', '7747', '1577', 'Y', 'h', 'L', 'o', 'M', 'h']

13, 5671, 5253, 7593, 22, 2, 19, 3231, 509, 24, 2769, 3875, 13, 25, 16, 19, 16, 17, 11, 3589, 453, 5049, 15, 4, 25, 12, 2325, 2313, 7, 7747, 1577, 25, 8, 12, 15, 13, 8