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: ['R', '7011', '4033', '8793', '5331', '3745', 'W', '4993', 'k', '2171', 'U', '759', '7133', 'q', 'a', '5471', 'z', '7563', 'v', 'F', 'D', '3645', 'W', 'z', 'i', '2385', '4837', '6639', '3081', '9111']

18, 7011, 4033, 8793, 5331, 3745, 23, 4993, 11, 2171, 21, 759, 7133, 17, 1, 5471, 26, 7563, 22, 6, 4, 3645, 23, 26, 9, 2385, 4837, 6639, 3081, 9111