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: ['2839', '7851', '7211', 'n', 'Y', 'c', '9295', '7709', 'j', 'n', 'g', '6829', 'Z', 'j', '931', '827', 'Q', '5925', '3071', 'e', '2177', '7623', '4093', '3263', 'Y', 'F', 'M', 'K', '1487', '2845', 'v', '267', '5811', 'J', 'c', 'z', '9353', 'k', 'x']

2839, 7851, 7211, 14, 25, 3, 9295, 7709, 10, 14, 7, 6829, 26, 10, 931, 827, 17, 5925, 3071, 5, 2177, 7623, 4093, 3263, 25, 6, 13, 11, 1487, 2845, 22, 267, 5811, 10, 3, 26, 9353, 11, 24