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: ['9351', '7933', '7391', 'b', 'H', '3177', '4709', '8025', '731', 'v', '6347', 'K', '8869', '6107', '1873', 's', '3639']

9351, 7933, 7391, 2, 8, 3177, 4709, 8025, 731, 22, 6347, 11, 8869, 6107, 1873, 19, 3639