B33113313132313113313223313331323132313233313132233132313232121   >>    B3311331313231311331322331333132313231323331313223313231323212   <<    B33113313132313113313223313331323132313233313132233132313232123   >>      B33113313132313113313223313331323132313233313132233132313232122   >>