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: ['w', '6303', '961', '3347', 'i', '4759', '7113', '9937', 'E', 'L', 'D', 'R', '1001', 'U', '491', '7045', '1053', 'i', '6701', '7363', 'F', 'R', '1593', 'R', 'e', '7389', 'c', 'x', '9141', 'j', '5019', 'E', 'u', 'R', '3645', 'W']

23, 6303, 961, 3347, 9, 4759, 7113, 9937, 5, 12, 4, 18, 1001, 21, 491, 7045, 1053, 9, 6701, 7363, 6, 18, 1593, 18, 5, 7389, 3, 24, 9141, 10, 5019, 5, 21, 18, 3645, 23