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: ['T', 'b', 'i', 'C', 'p', 'A', '345', '2435', '4851', 'h', 'h', '87', '847', 'W', 'X', 'Q', '4915', 'V', 'I', 'P', 'z', 'f', '289', 'F', '721', '9653', '1387', 'w', '6537', '4481', 'd', '6085', 'C', 't']

20, 2, 9, 3, 16, 1, 345, 2435, 4851, 8, 8, 87, 847, 23, 24, 17, 4915, 22, 9, 16, 26, 6, 289, 6, 721, 9653, 1387, 23, 6537, 4481, 4, 6085, 3, 20