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: ['g', 'P', '7659', 'R', 'A', 'j', '2909', '6413', '2129', '1033', 'b', 'P', 'G', '3221', 'O', '2573', '8821', 'r', '6417', 'm', 'f', 'y', 'q', '6607', '5777', '9373', 'n', 'k', '7445', '2675', '897', '9709', 'd', 'g', '6469', '4251']

7, 16, 7659, 18, 1, 10, 2909, 6413, 2129, 1033, 2, 16, 7, 3221, 15, 2573, 8821, 18, 6417, 13, 6, 25, 17, 6607, 5777, 9373, 14, 11, 7445, 2675, 897, 9709, 4, 7, 6469, 4251