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: ['G', 'J', '2603', '6835', '3951', '4805', '6067', 'K', 'D', '8291', '2607', 'i', 'P', '5233', 'c', '2845', '2969', 'Q', 'g', '4857', 'w', 'G', '3001', '6571', 'V', 'M', '5671', 'u', '3479', '8021', '4729', '7749']

7, 10, 2603, 6835, 3951, 4805, 6067, 11, 4, 8291, 2607, 9, 16, 5233, 3, 2845, 2969, 17, 7, 4857, 23, 7, 3001, 6571, 22, 13, 5671, 21, 3479, 8021, 4729, 7749