B3311331313231311331322331333132313233313233231333133313331323223313221231   >>    B331133131323131133132233133313231323331323323133313331333132322331322123   <<    B3311331313231311331322331333132313233313233231333133313331323223313221233   >>      B3311331313231311331322331333132313233313233231333133313331323223313221232   >>