C1111233131211111211113313331333133313331333133313331333121111331323222331221   >>    C111123313121111121111331333133313331333133313331333133312111133132322233122   <<    C1111233131211111211113313331333133313331333133313331333121111331323222331223   >>      C1111233131211111211113313331333133313331333133313331333121111331323222331222   >>