C111123313331323113313331333133313331323112133313331333133312111133231321   >>    C11112331333132311331333133313331333132311213331333133313331211113323132   <<    C111123313331323113313331333133313331323112133313331333133312111133231323   >>      C111123313331323113313331333133313331323112133313331333133312111133231322   >>