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: ['r', 'M', 'K', '9091', 'f', '9671', 't', 'V', '7211', 'n', 'Y', 'q', 'P', 'p', 'i']

18, 13, 11, 9091, 6, 9671, 20, 22, 7211, 14, 25, 17, 16, 16, 9