C111123313331323113313331333133313331323112133313331333121111133323221221   >>    C11112331333132311331333133313331333132311213331333133312111113332322122   <<    C111123313331323113313331333133313331323112133313331333121111133323221223   >>      C111123313331323113313331333133313331323112133313331333121111133323221222   >>