B3311331313231311331322331333132322331323232233133313231323132322131   >>    B331133131323131133132233133313232233132323223313331323132313232213   <<    B3311331313231311331322331333132322331323232233133313231323132322133   >>      B3311331313231311331322331333132322331323232233133313231323132322132   >>