C212212121212113313132333131313232233132321133131311331323211111   >>    C21221212121211331313233313131323223313232113313131133132321111   <<    C212212121212113313132333131313232233132321133131311331323211113   >>      C212212121212113313132333131313232233132321133131311331323211112   >>