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: ['1479', 'E', 't', 'v', 'p', 'e', 'L', 'x', '8527', 'd', '7021', 'x', '6299', '4465', '5157', '2743', '1767', '5947', 'A', '3879', '7343', 'N', '745', '9923', 'T', '809', '415', '29', 'h', 'r', 'l', 'j', 'g', 'd']

1479, 5, 20, 22, 16, 5, 12, 24, 8527, 4, 7021, 24, 6299, 4465, 5157, 2743, 1767, 5947, 1, 3879, 7343, 14, 745, 9923, 20, 809, 415, 29, 8, 18, 12, 10, 7, 4