C11112331333132311331333133313331333132311213331211111121132211   >>    C1111233133313231133133313331333133313231121333121111112113221   <<    C11112331333132311331333133313331333132311213331211111121132213   >>      C11112331333132311331333133313331333132311213331211111121132212   >>