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: ['t', '5027', 'C', '3101', 'U', '4493', '917', '5509', '8783', 'l', 'H', '6143', '6337', 'j', '9307', '4997', 'X', 'u', 'W', 'r', 'R', 'F', 'H', 'f', 'g', 'r', '9663', '9101']

20, 5027, 3, 3101, 21, 4493, 917, 5509, 8783, 12, 8, 6143, 6337, 10, 9307, 4997, 24, 21, 23, 18, 18, 6, 8, 6, 7, 18, 9663, 9101