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: ['I', 'w', '8839', '957', '2261', '4723', 'U', 'r', 'G', 'F', 'Q', 'z', '7531', 'd', '8313', 't', '8001', 'F', '1899', '8975', '6321', '2417', '727', 'u', '8249', 'y', 'v', '6771', '9513', '7639', '9183', 'p', '7857', 'C', 'p']

9, 23, 8839, 957, 2261, 4723, 21, 18, 7, 6, 17, 26, 7531, 4, 8313, 20, 8001, 6, 1899, 8975, 6321, 2417, 727, 21, 8249, 25, 22, 6771, 9513, 7639, 9183, 16, 7857, 3, 16