B3311331313231311331322331333132313232233131311331333132333132322331322332211   >>    B331133131323131133132233133313231323223313131133133313233313232233132233221   <<    B3311331313231311331322331333132313232233131311331333132333132322331322332213   >>      B3311331313231311331322331333132313232233131311331333132333132322331322332212   >>