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: ['S', '6633', 'Z', 'Z', 'z', '3153', 'v', '8901', '4861', 'k', '1859', '5583', '1831', 'L', 't', 'Y', 'T', '5109', 'm', '9131', '8421', 'Y', '509', 'o', 'Y', 'D', '8353', '1203', '8961', '2323', 'H', '3895', 'R', 'm', 'D', '2731', '7535']

19, 6633, 26, 26, 26, 3153, 22, 8901, 4861, 11, 1859, 5583, 1831, 12, 20, 25, 20, 5109, 13, 9131, 8421, 25, 509, 15, 25, 4, 8353, 1203, 8961, 2323, 8, 3895, 18, 13, 4, 2731, 7535