B3311331313231311331322331333132313231323211331323133313231323331323211221   >>    B331133131323131133132233133313231323132321133132313331323132333132321122   <<    B3311331313231311331322331333132313231323211331323133313231323331323211223   >>      B3311331313231311331322331333132313231323211331323133313231323331323211222   >>