C111123313331323113313331333133313331323112133313331333121111131331123232131   >>    C11112331333132311331333133313331333132311213331333133312111113133112323213   <<    C111123313331323113313331333133313331323112133313331333121111131331123232133   >>      C111123313331323113313331333133313331323112133313331333121111131331123232132   >>