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: ['U', '2281', '5375', 'Y', 'J', 'V', 'N', '5719', 'J', 'L', '1733', 'I', 'N', '3627', '8117', '7715', '6017', '1513', '185', 'Z', '8775', 'R', '4825', '6923', 'c', '8575', 'x', '4539', 'u', 'q', 'K', 'M', 'K']

21, 2281, 5375, 25, 10, 22, 14, 5719, 10, 12, 1733, 9, 14, 3627, 8117, 7715, 6017, 1513, 185, 26, 8775, 18, 4825, 6923, 3, 8575, 24, 4539, 21, 17, 11, 13, 11