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: ['953', 'c', 'k', 'm', 'p', 'E', 'i', 'P', '7831', '2045', 'V', '5303', 'y', 'q', 'X', '5979', 'V', '1071', 'w', 'B', '7697', 'v', 'f', 'r']

953, 3, 11, 13, 16, 5, 9, 16, 7831, 2045, 22, 5303, 25, 17, 24, 5979, 22, 1071, 23, 2, 7697, 22, 6, 18