C111123313331323113313331333133313231323133312111133112211232212111   >>    C11112331333132311331333133313331323132313331211113311221123221211   <<    C111123313331323113313331333133313231323133312111133112211232212113   >>      C111123313331323113313331333133313231323133312111133112211232212112   >>