C11112331312111112111133133313331333133311222121111113313331322331313111   >>    C1111233131211111211113313331333133313331122212111111331333132233131311   <<    C11112331312111112111133133313331333133311222121111113313331322331313113   >>      C11112331312111112111133133313331333133311222121111113313331322331313112   >>