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: ['9901', 'M', 'G', '6463', 'Y', 'U', 'C', '2915', '3787', '4765', '8651', 'V', 'V', '9619', '6695', 'Y', 'u', '3347', 'b', 'd', 't', '6711', '7385', 'i', 'h', 'V']

9901, 13, 7, 6463, 25, 21, 3, 2915, 3787, 4765, 8651, 22, 22, 9619, 6695, 25, 21, 3347, 2, 4, 20, 6711, 7385, 9, 8, 22