C1111233131211111211113313331333133313232212111133133311233222311   >>    C111123313121111121111331333133313331323221211113313331123322231   <<    C1111233131211111211113313331333133313232212111133133311233222313   >>      C1111233131211111211113313331333133313232212111133133311233222312   >>