B3311331313231311331322331333132313331323133313233313331333133311233132221   >>    B331133131323131133132233133313231333132313331323331333133313331123313222   <<    B3311331313231311331322331333132313331323133313233313331333133311233132223   >>      B3311331313231311331322331333132313331323133313233313331333133311233132222   >>