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: ['Q', '6423', 'n', 'q', '5945', 'E', '1665', '35', 'R', '7685', '1975', '1819', 'k', 'w', 'V']

17, 6423, 14, 17, 5945, 5, 1665, 35, 18, 7685, 1975, 1819, 11, 23, 22