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: ['B', '4767', '6169', '2783', '1769', 't', 's', '1081', 'w', 'a', 'y', '1017', '4579', '8695', 'u', '5529', '7357', '1575', 'C', '8097', 'A', 'k', 'r', '4141', 'N', 'm', 'q', '3775', '7111', '1047', 'H', '5195', 'F', 'i', 'R', 'e', '3653', '5747', '7555']

2, 4767, 6169, 2783, 1769, 20, 19, 1081, 23, 1, 25, 1017, 4579, 8695, 21, 5529, 7357, 1575, 3, 8097, 1, 11, 18, 4141, 14, 13, 17, 3775, 7111, 1047, 8, 5195, 6, 9, 18, 5, 3653, 5747, 7555