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: ['7949', 'R', 'n', 'P', 'n', '909', 'z', 'X', 'D', 'g', '8135', '4973', 'A', 'R', 'N', '1415', 'M', '83', 'z', '3841', 'e', '3067', '7591', '897', '1839', '9387', '9479', '5599', 'z', '8353', 'h', 'm', '7001', 'Q']

7949, 18, 14, 16, 14, 909, 26, 24, 4, 7, 8135, 4973, 1, 18, 14, 1415, 13, 83, 26, 3841, 5, 3067, 7591, 897, 1839, 9387, 9479, 5599, 26, 8353, 8, 13, 7001, 17