B3311331313231311331322331333132313331313221211113311233132313211   >>    B331133131323131133132233133313231333131322121111331123313231321   <<    B3311331313231311331322331333132313331313221211113311233132313213   >>      B3311331313231311331322331333132313331313221211113311233132313212   >>