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: ['7619', '4421', 'a', 'N', 'm', 's', 'G', '1895', '2285', '4441', 'j', '3967', 'C', 'X', 'I', 'x', '2127', 'e', 'F', '7295', '6551', 'a', '1039', '459', 'X', 'j', '3767', 'M', '1307', '895', '3837', '2673', '4621', 'e']

7619, 4421, 1, 14, 13, 19, 7, 1895, 2285, 4441, 10, 3967, 3, 24, 9, 24, 2127, 5, 6, 7295, 6551, 1, 1039, 459, 24, 10, 3767, 13, 1307, 895, 3837, 2673, 4621, 5