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', '1201', 't', 'J', '8719', 'J', '4155', '499', '6703', '4361', '2127', '5755', '5653', 'V']

18, 1201, 20, 10, 8719, 10, 4155, 499, 6703, 4361, 2127, 5755, 5653, 22