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: ['L', '5509', 'C', '2571', '4243', 'W', 'y', 'p', '8763', '7521', '9107', '415', '5827', 'n', 'Z', 'b', '4811', 'R', 'r', 'o', '9293', 'T', '7573', 'A', 'H', 'N', 'C', '8703', '6675', '9815', 'b', 'q', '4625', '6369', '497', 'g', '3195']

12, 5509, 3, 2571, 4243, 23, 25, 16, 8763, 7521, 9107, 415, 5827, 14, 26, 2, 4811, 18, 18, 15, 9293, 20, 7573, 1, 8, 14, 3, 8703, 6675, 9815, 2, 17, 4625, 6369, 497, 7, 3195