C1111233131211111211113313331333133313331333133313331333121111331323311121   >>    C111123313121111121111331333133313331333133313331333133312111133132331112   <<    C1111233131211111211113313331333133313331333133313331333121111331323311123   >>      C1111233131211111211113313331333133313331333133313331333121111331323311122   >>