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: ['4805', 'U', '2347', '5351', '3767', '173', '2103', '9417', 'z', 'j', 'w', 'U', '3355', 'Q']

4805, 21, 2347, 5351, 3767, 173, 2103, 9417, 26, 10, 23, 21, 3355, 17