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: ['3185', 'J', '4907', 'g', 'G', '1985', 't', 'j', '2855', '9079', 'i', '5341', '3705', '2481', '3639', 'C', '1145', '7975', '3241', 'j', 'g', '6901']

3185, 10, 4907, 7, 7, 1985, 20, 10, 2855, 9079, 9, 5341, 3705, 2481, 3639, 3, 1145, 7975, 3241, 10, 7, 6901