C3131313233313113313223313223313112113313233313223313231322333231   >>    C313131323331311331322331322331311211331323331322331323132233323   <<    C3131313233313113313223313223313112113313233313223313231322333233   >>      C3131313233313113313223313223313112113313233313223313231322333232   >>