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: ['1233', '265', 'Q', 'z', 'o', 'i', '7281', '445', '9649', 'A', '697', '757', '6089', '5325', 'L', '2537', '591', 'r', 'C', '1801', 'Z', 'u', 'u']

1233, 265, 17, 26, 15, 9, 7281, 445, 9649, 1, 697, 757, 6089, 5325, 12, 2537, 591, 18, 3, 1801, 26, 21, 21