B3311331313231311331322331333132322132322331323132322331323132311211321   >>    B331133131323131133132233133313232213232233132313232233132313231121132   <<    B3311331313231311331322331333132322132322331323132322331323132311211323   >>      B3311331313231311331322331333132322132322331323132322331323132311211322   >>