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: ['1191', '161', '1937', '3657', 'U', 'Y', 'N', '4753', 'D', '2859', '6521', 'C', '4813', 'a', '5367', '4659', 's', 'u', 'S', 'x', 'P', '2035', 'H', 'I', '81', 'l', 'J', 'I', '3811', '7435', 'J', 'b', 'Y', 'W', 'J', '3687', '3889', 'G', 'h']

1191, 161, 1937, 3657, 21, 25, 14, 4753, 4, 2859, 6521, 3, 4813, 1, 5367, 4659, 19, 21, 19, 24, 16, 2035, 8, 9, 81, 12, 10, 9, 3811, 7435, 10, 2, 25, 23, 10, 3687, 3889, 7, 8