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: ['1191', '6691', 'v', '7031', '4207', '5457', '3153', '3391', '3905', 'g', 'A', '4641', '5131', 'u', '4249', '6103']

1191, 6691, 22, 7031, 4207, 5457, 3153, 3391, 3905, 7, 1, 4641, 5131, 21, 4249, 6103