C1111233131211111211113313331333133313221211113313331333133313232212113121   >>    C111123313121111121111331333133313331322121111331333133313331323221211312   <<    C1111233131211111211113313331333133313221211113313331333133313232212113123   >>      C1111233131211111211113313331333133313221211113313331333133313232212113122   >>