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: ['Q', 'Z', '679', '5469', 'X', '6209', '5667', 'b', 'B', 'm', '6145', 'r', '8115', 'g', 'k', '7537', 'h', '3657', 'a', 'V', '2769', '2339', '8623', 't', '8571', 'J', '4651', 'H', '7869', 'S', 'J', '4025', '2597', 'M', '3255', 'I', 'r', 'A', 'u', '769']

17, 26, 679, 5469, 24, 6209, 5667, 2, 2, 13, 6145, 18, 8115, 7, 11, 7537, 8, 3657, 1, 22, 2769, 2339, 8623, 20, 8571, 10, 4651, 8, 7869, 19, 10, 4025, 2597, 13, 3255, 9, 18, 1, 21, 769