C11112331333132311331333133313331333132313121111331121133132313311231211   >>    C1111233133313231133133313331333133313231312111133112113313231331123121   <<    C11112331333132311331333133313331333132313121111331121133132313311231213   >>      C11112331333132311331333133313331333132313121111331121133132313311231212   >>