C111123313331323113313331333133313331323112133313331311132322121   >>    C11112331333132311331333133313331333132311213331333131113232212   <<    C111123313331323113313331333133313331323112133313331311132322123   >>      C111123313331323113313331333133313331323112133313331311132322122   >>