C22212323232133313113313331333133313231323133311232332133213211   >>    C2221232323213331311331333133313331323132313331123233213321321   <<    C22212323232133313113313331333133313231323133311232332133213213   >>      C22212323232133313113313331333133313231323133311232332133213212   >>