C111123313331323113313331333133313331323112133313331333133312121133132233312321   >>    C11112331333132311331333133313331333132311213331333133313331212113313223331232   <<    C111123313331323113313331333133313331323112133313331333133312121133132233312323   >>      C111123313331323113313331333133313331323112133313331333133312121133132233312322   >>