B3311331313231311331322331333132313233313233313132333133313231323223313232111   >>    B331133131323131133132233133313231323331323331313233313331323132322331323211   <<    B3311331313231311331322331333132313233313233313132333133313231323223313232113   >>      B3311331313231311331322331333132313233313233313132333133313231323223313232112   >>