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: ['j', 'T', 'V', '355', 'm', 'a', 'W', 'j', '1177', 'E', '9219', 'k', '1687']

10, 20, 22, 355, 13, 1, 23, 10, 1177, 5, 9219, 11, 1687