C111123313121111121111331333132313331323133313332313331333133313232212121   >>    C11112331312111112111133133313231333132313331333231333133313331323221212   <<    C111123313121111121111331333132313331323133313332313331333133313232212123   >>      C111123313121111121111331333132313331323133313332313331333133313232212122   >>