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: ['6983', '415', '3833', '4809', 'V', 'L', 'G', '9547', '1167', 'j', 'W', 'b', '3427', '8061', 'z', '817', '7887', 'I', 't', '4079', '3251', 'W', 'B', '9429', 'c', 'j', '1753', '1959', '3543', 'M', '6037', '6205', '2371', 'k', 'o', '3657', 'q', 't', 'v', '1969']

6983, 415, 3833, 4809, 22, 12, 7, 9547, 1167, 10, 23, 2, 3427, 8061, 26, 817, 7887, 9, 20, 4079, 3251, 23, 2, 9429, 3, 10, 1753, 1959, 3543, 13, 6037, 6205, 2371, 11, 15, 3657, 17, 20, 22, 1969