C11112331333132311331333132313331333133313233121111331333132313333112312121   >>    C1111233133313231133133313231333133313331323312111133133313231333311231212   <<    C11112331333132311331333132313331333133313233121111331333132313333112312123   >>      C11112331333132311331333132313331333133313233121111331333132313333112312122   >>