C111112111133131121133133313331333121111112113313231333133313223313231221   >>    C11111211113313112113313331333133312111111211331323133313331322331323122   <<    C111112111133131121133133313331333121111112113313231333133313223313231223   >>      C111112111133131121133133313331333121111112113313231333133313223313231222   >>