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: ['h', 'b', 'x', '4091', 'Y', 't', '2387', 'x', '7731', 'r', '3939', '1789', '5385', 'P', 'z', '9443', 'f', '1529', 't', 'f', 'r', '7969', '2847', 'R', '2079', 'b', 'x', '9657', '6107', '4027', 'T', 'Y', 'R', '67', '7161', '7307']

8, 2, 24, 4091, 25, 20, 2387, 24, 7731, 18, 3939, 1789, 5385, 16, 26, 9443, 6, 1529, 20, 6, 18, 7969, 2847, 18, 2079, 2, 24, 9657, 6107, 4027, 20, 25, 18, 67, 7161, 7307