C111123313121111121111331333133313331333133313121111331331121133132313232211   >>    C11112331312111112111133133313331333133313331312111133133112113313231323221   <<    C111123313121111121111331333133313331333133313121111331331121133132313232213   >>      C111123313121111121111331333133313331333133313121111331331121133132313232212   >>