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: ['2119', 'U', 'Q', 'l', 'w', '7961', 'V', 'Z', '5179', '321', '215', '1551', 'N', '5137', 'j', 'r', '8937', '3599', 'I', 'e', 'O', '9899', 'p', '2455', 'm', 'G', 'q', '51', '2261', '6567', '7915', '1261', 'v', '8943', '8597', '7317']

2119, 21, 17, 12, 23, 7961, 22, 26, 5179, 321, 215, 1551, 14, 5137, 10, 18, 8937, 3599, 9, 5, 15, 9899, 16, 2455, 13, 7, 17, 51, 2261, 6567, 7915, 1261, 22, 8943, 8597, 7317