B3311331313231311331322331333131133132333132333133313223313231323131122121   >>    B331133131323131133132233133313113313233313233313331322331323132313112212   <<    B3311331313231311331322331333131133132333132333133313223313231323131122123   >>      B3311331313231311331322331333131133132333132333133313223313231323131122122   >>