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: ['7775', '3087', 'b', '4441', 'v', 'P', 'Z', '2257', '1953', '6451', 'Q', 'Z', '9767', 'P', '9143', 'd', 'R', '4683', '749', 'g', '5363', '321', 's', '2885', 'N', '4257', '7457', 'o', 'Q', 'B', '3889', 'H', 'm', 'U', 'Q', '7829', '6277', '1169', '481']

7775, 3087, 2, 4441, 22, 16, 26, 2257, 1953, 6451, 17, 26, 9767, 16, 9143, 4, 18, 4683, 749, 7, 5363, 321, 19, 2885, 14, 4257, 7457, 15, 17, 2, 3889, 8, 13, 21, 17, 7829, 6277, 1169, 481