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: ['c', 'E', 'S', '2511', '1783', 'a', 'g', 'l', '6733', 'T', 'T', 'f', 'f', 'd', '7215', '7873', 'C', '1139', 'q', '9813', 'V', '2947', 'M', 'i', '5337', 'G', '9203', 'N', 'V', '5771', 'd', '9251', '2185', '6389', '8695', 'x', '5735', '9059', '3061']

3, 5, 19, 2511, 1783, 1, 7, 12, 6733, 20, 20, 6, 6, 4, 7215, 7873, 3, 1139, 17, 9813, 22, 2947, 13, 9, 5337, 7, 9203, 14, 22, 5771, 4, 9251, 2185, 6389, 8695, 24, 5735, 9059, 3061