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', '1303', 'b', 'e', '669', 'E', 'E', 'F', 't', 'n', 'V', 'M', 't', '8273', 's', '2401', '3393', '1267', '2975', '7793', 'v', '4331', 'z', '4983', 'v', 'P', '771', '4169', '9795', '3849', '1001']

18, 1303, 2, 5, 669, 5, 5, 6, 20, 14, 22, 13, 20, 8273, 19, 2401, 3393, 1267, 2975, 7793, 22, 4331, 26, 4983, 22, 16, 771, 4169, 9795, 3849, 1001