B3311331313231311331322331333132313331323133313233313231322132313221   >>    B331133131323131133132233133313231333132313331323331323132213231322   <<    B3311331313231311331322331333132313331323133313233313231322132313223   >>      B3311331313231311331322331333132313331323133313233313231322132313222   >>