B3311331313231311331322331333132322121211111333132322331311211311   >>    B331133131323131133132233133313232212121111133313232233131121131   <<    B3311331313231311331322331333132322121211111333132322331311211313   >>      B3311331313231311331322331333132322121211111333132322331311211312   >>