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: ['P', 'p', '3101', 'j', 'x', 'a', 'b', 'p', 'f', '7785', 'Y', '7343', 'A', 'S', 'H', '3523', 'S', 'u', 'V', '1577']

16, 16, 3101, 10, 24, 1, 2, 16, 6, 7785, 25, 7343, 1, 19, 8, 3523, 19, 21, 22, 1577