C111123313331323113313331333133313331323112133313331333132233211211   >>    C11112331333132311331333133313331333132311213331333133313223321121   <<    C111123313331323113313331333133313331323112133313331333132233211213   >>      C111123313331323113313331333133313331323112133313331333132233211212   >>