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: ['7449', 'P', 'r', 'k', '7363', 'y', 'H', 'I', 'x', '2503', '4003', 'X', '7753', '8275', 'g', '6055', '1521', '4021', 'O', 'C', 'R', 'f', 'S', '5825', 'c', 'F', '923', '7153', '6099', 'U', 'w', '2809', '3841', 'w', 'q', '6319', 'U', '1693', '1415']

7449, 16, 18, 11, 7363, 25, 8, 9, 24, 2503, 4003, 24, 7753, 8275, 7, 6055, 1521, 4021, 15, 3, 18, 6, 19, 5825, 3, 6, 923, 7153, 6099, 21, 23, 2809, 3841, 23, 17, 6319, 21, 1693, 1415