C111112111133131121133133313331323133313221211111333133313331333112323223213211   >>    C11111211113313112113313331333132313331322121111133313331333133311232322321321   <<    C111112111133131121133133313331323133313221211111333133313331333112323223213213   >>      C111112111133131121133133313331323133313221211111333133313331333112323223213212   >>