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: ['M', '4979', 'Y', '6735', 'e', '269', 'K', 'E', 'k', 'K', '6869', '4463', 'l', 'G', '8291', 'y', '5515', 'i', '5377', '8863', '7595', 'Y', 'M', '2187', '9017', '3679', 's', 'Y', '2067', '361']

13, 4979, 25, 6735, 5, 269, 11, 5, 11, 11, 6869, 4463, 12, 7, 8291, 25, 5515, 9, 5377, 8863, 7595, 25, 13, 2187, 9017, 3679, 19, 25, 2067, 361