C11111211113313112113313331333133313331333121131211111133133313223322113121   >>    C1111121111331311211331333133313331333133312113121111113313331322332211312   <<    C11111211113313112113313331333133313331333121131211111133133313223322113123   >>      C11111211113313112113313331333133313331333121131211111133133313223322113122   >>