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: ['v', '5701', 'o', '5861', '499', 'Y', 'v', 'g', 'f', 'K', '875', 'T', 'n', 'c', 'k']

22, 5701, 15, 5861, 499, 25, 22, 7, 6, 11, 875, 20, 14, 3, 11