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: ['1949', '8001', 'N', 'v', 'o', '2579', 'a', 'P', 'G', 'J', 'u', 'h', '5117', '5709', 'q', 'Y', '4671', '7933', 'U', 'z', 'u', 'm', '7171', '7561', 'z', '9533', 'j', '7683']

1949, 8001, 14, 22, 15, 2579, 1, 16, 7, 10, 21, 8, 5117, 5709, 17, 25, 4671, 7933, 21, 26, 21, 13, 7171, 7561, 26, 9533, 10, 7683