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: ['4985', '7361', 'u', '5073', 'L', '7475', 'u', 'L', 'r', 'K', '8835', 'u', '5155', '9579', 'c', 'H', 'P', 'U', 'k', 'K', 'j', '5503', '161', '6549', 'R', '7187', '3027']

4985, 7361, 21, 5073, 12, 7475, 21, 12, 18, 11, 8835, 21, 5155, 9579, 3, 8, 16, 21, 11, 11, 10, 5503, 161, 6549, 18, 7187, 3027