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', 'C', '5683', 'w', '7181', 'r', 'M', '9521', '3969', 'f', '2829', 'c', 'z', 'g', 'A', 'v', '245', '1767', 'y', '6025', '1367', 'E', '5069', '723', '1121', 's', 'm', 'd', '481', '9577', '5917', 'x', 'U', '6505', '8353', '7349', 's', 'e']

19, 3, 5683, 23, 7181, 18, 13, 9521, 3969, 6, 2829, 3, 26, 7, 1, 22, 245, 1767, 25, 6025, 1367, 5, 5069, 723, 1121, 19, 13, 4, 481, 9577, 5917, 24, 21, 6505, 8353, 7349, 19, 5