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: ['a', 'k', 'v', '6499', 'v', 'u', 'l', 'z', 'C', '4277', 'z', 'R', 'f', 'e', '2547', 'Q', '8885', 'I', '5493', '573', 'd', '8385', '5461', 'K', '9457', '3989', '3867', 'I', 'Q', 'W', '6099', '3305', '2889', '1755', '1457', '713', 'L', '3705']

1, 11, 22, 6499, 22, 21, 12, 26, 3, 4277, 26, 18, 6, 5, 2547, 17, 8885, 9, 5493, 573, 4, 8385, 5461, 11, 9457, 3989, 3867, 9, 17, 23, 6099, 3305, 2889, 1755, 1457, 713, 12, 3705