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: ['7099', 'i', '241', 'i', '915', 'y', 'N', '4167', 'J', 'Z', 'J', 'r', '3053', '6081', '975', '3245', 'Y', '377', 'S', '4689', 'z', '4947', '1889', 'N', '6587', '8163', 'M', 'C', 'W', 'M', '9621', 'v', '9287', '1125', '6989']

7099, 9, 241, 9, 915, 25, 14, 4167, 10, 26, 10, 18, 3053, 6081, 975, 3245, 25, 377, 19, 4689, 26, 4947, 1889, 14, 6587, 8163, 13, 3, 23, 13, 9621, 22, 9287, 1125, 6989