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: ['C', '8119', 'b', '8825', '9603', 'd', '7575', 'N', '931', '9471', 't', '7389', 'v', 'g', '3993', '8869', 'r', '3391', 'i', '4289', 'o', 'Q', '1725', 'M', '2543', '6509', 'i', '5573', 'Q']

3, 8119, 2, 8825, 9603, 4, 7575, 14, 931, 9471, 20, 7389, 22, 7, 3993, 8869, 18, 3391, 9, 4289, 15, 17, 1725, 13, 2543, 6509, 9, 5573, 17