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: ['1501', 'R', 'H', '4033', 's', 'Z', 'v', 'k', 'j', '9461', '2047', '5349', 'v', '9647', '2649', '8107', 'z', '6587', 'N', '1095', '1249', 'B', 'I', '5147', '6851', 'A', '5721', '745', '3237', 'y', 'i', '2727', '9301', 'e']

1501, 18, 8, 4033, 19, 26, 22, 11, 10, 9461, 2047, 5349, 22, 9647, 2649, 8107, 26, 6587, 14, 1095, 1249, 2, 9, 5147, 6851, 1, 5721, 745, 3237, 25, 9, 2727, 9301, 5