C22212323232133313113313331333133313231323133313331121231221321122123212121   >>    C2221232323213331311331333133313331323132313331333112123122132112212321212   <<    C22212323232133313113313331333133313231323133313331121231221321122123212123   >>      C22212323232133313113313331333133313231323133313331121231221321122123212122   >>