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: ['5955', 'f', '7537', '565', 'R', 'q', 'M', '223', '9993', '3861', 'L', '5493', 'I', 'u', 'w', 'Z', 'N', 'L', 'O', '355', 'A', 'b', 'l', 'J', '1401']

5955, 6, 7537, 565, 18, 17, 13, 223, 9993, 3861, 12, 5493, 9, 21, 23, 26, 14, 12, 15, 355, 1, 2, 12, 10, 1401