Messages should not contain correct solutions.

i use 2 TreeSet<Integer>, nope, ok
nope is prepopulated with 2, ok is prepopulated with 10

in cycle i read counts into one of them with checking if other one does not contain new value has been read recently

if nope.last()>=ok.first() then the result is ok.first()

nope.last>=ok.first ("g" instead of "ge" because they are never equal)