B3311331313231311331322331333132313331322331323133313223313113311213111   >>    B331133131323131133132233133313231333132233132313331322331311331121311   <<    B3311331313231311331322331333132313331322331323133313223313113311213113   >>      B3311331313231311331322331333132313331322331323133313223313113311213112   >>