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: ['85', '3559', 'g', 'G', 'G', '785', 'j', 'r', '4015', 'R', '5939', 'B', '7355', 'n', '6247', '4525', '5557', '5361', '2401', 'W', '1033', '1001', 'Z', '8739', 'f']

85, 3559, 7, 7, 7, 785, 10, 18, 4015, 18, 5939, 2, 7355, 14, 6247, 4525, 5557, 5361, 2401, 23, 1033, 1001, 26, 8739, 6