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: ['4703', 'E', 'A', 'A', 'a', '9009', '7313', '6377', '4867', 'b', 'x', 'c', 'T', 'x', 'F', '455', '9353', '2191', 'e']

4703, 5, 1, 1, 1, 9009, 7313, 6377, 4867, 2, 24, 3, 20, 24, 6, 455, 9353, 2191, 5