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: ['l', '8589', 'a', 'x', '4409', 'a', 'B', 'c', 'p', 'h', '2255', '6165', '1071', '819', '6759', 'F', 'T', 'V', '4375', '6205', 'P', 'p', '249', '2509', 'D', 'u', 'w', '4829', 'l', '3527', 'I', '9917', 'v', '4903', 'L', '1157', '6955']

12, 8589, 1, 24, 4409, 1, 2, 3, 16, 8, 2255, 6165, 1071, 819, 6759, 6, 20, 22, 4375, 6205, 16, 16, 249, 2509, 4, 21, 23, 4829, 12, 3527, 9, 9917, 22, 4903, 12, 1157, 6955