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', 'Z', 'r', '4913', 'r', '2249', '7355', '2027', '5453', 'E', '7921', '181', 's', '9785', '2893', '5823', '3955', 'W', '9977', '6363', 'K', 'a', '9857', '3283', 'i', '2457', 'd', 'K', 'R', 'V', 'E', '5061', '7939']

13, 26, 18, 4913, 18, 2249, 7355, 2027, 5453, 5, 7921, 181, 19, 9785, 2893, 5823, 3955, 23, 9977, 6363, 11, 1, 9857, 3283, 9, 2457, 4, 11, 18, 22, 5, 5061, 7939