B3311331313231311331322331333132313331323133313233313331333133313223313222211   >>    B331133131323131133132233133313231333132313331323331333133313331322331322221   <<    B3311331313231311331322331333132313331323133313233313331333133313223313222213   >>      B3311331313231311331322331333132313331323133313233313331333133313223313222212   >>