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', '1549', '1949', '6155', '3863', '2755', '2627', '2181', 'n', 'r', '235', 'F', 'V', '9049', '6531', '9153', '5353', 'C', 'i', '9545', '3683', 'R', '5049', 'C', 'D', 'A', 'N', '1727', '5743', 'W', '8003', '4017', 'K', 'B', '1163', 'u', '9179', '8535', '787', 'e']

19, 1549, 1949, 6155, 3863, 2755, 2627, 2181, 14, 18, 235, 6, 22, 9049, 6531, 9153, 5353, 3, 9, 9545, 3683, 18, 5049, 3, 4, 1, 14, 1727, 5743, 23, 8003, 4017, 11, 2, 1163, 21, 9179, 8535, 787, 5