correspond to a meeting correspond to ending in a or correspond to ending in be right um I guess I've been just I haven't defined what corresponds to mean yet I just mean that we're defining these two sets s a s sub a is gonna be all the numbers divisible by 4 and s would be is gonna be the others and so so we we've just defined these two sets and then I'll just describe how we encode some spring so let's say we want to encode the string be a B so again ENS builds up with some big natural number which is a state so we start at