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: ['7779', 'U', 'X', 'R', '727', 'q', '2457', '9833', '937', '1917', 'A', '8913', '2205', '5259', '9273', '6007', '4065', '6541', 'n', '9931', 'l', 'p', 'i', 'J', 'G', 'c', 'a', 'E']

7779, 21, 24, 18, 727, 17, 2457, 9833, 937, 1917, 1, 8913, 2205, 5259, 9273, 6007, 4065, 6541, 14, 9931, 12, 16, 9, 10, 7, 3, 1, 5