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: ['B', '151', 'y', 'L', 'd', '5017', 'm', '3855', 'Q', 'h', 'o', '4685', 'e', 'z', '8411', '4945', 'k', 'j', '4551', 'P', '9719', '4839', 'S', '9201', 'i', '4083', 'A', '5231', 'K', 'E', 'C', 'v', '6019', 'h', 'K', 'R', 'c']

2, 151, 25, 12, 4, 5017, 13, 3855, 17, 8, 15, 4685, 5, 26, 8411, 4945, 11, 10, 4551, 16, 9719, 4839, 19, 9201, 9, 4083, 1, 5231, 11, 5, 3, 22, 6019, 8, 11, 18, 3