C111112111133131121133133313331333133313331323133313331331121111133313233232221   >>    C11111211113313112113313331333133313331333132313331333133112111113331323323222   <<    C111112111133131121133133313331333133313331323133313331331121111133313233232223   >>      C111112111133131121133133313331333133313331323133313331331121111133313233232222   >>