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: ['1009', '3227', 'u', '5353', '6423', 'k', '3655', 'L', '1497', 'm', '5245', '5325', 'h', 'v', 'q', '5687', '6951', 'n', '9803', 'w', '175', 'R', '8989']

1009, 3227, 21, 5353, 6423, 11, 3655, 12, 1497, 13, 5245, 5325, 8, 22, 17, 5687, 6951, 14, 9803, 23, 175, 18, 8989