C1111233131211111211113313331333133313331333133313331333121111331323222212231   >>    C111123313121111121111331333133313331333133313331333133312111133132322221223   <<    C1111233131211111211113313331333133313331333133313331333121111331323222212233   >>      C1111233131211111211113313331333133313331333133313331333121111331323222212232   >>