C11112331312111112111133133313331333133313331333112211211113313231312331   >>    C1111233131211111211113313331333133313331333133311221121111331323131233   <<    C11112331312111112111133133313331333133313331333112211211113313231312333   >>      C11112331312111112111133133313331333133313331333112211211113313231312332   >>