read the data by rotary-o(ebicochineal)

using C=System.Console;class M{static int R(){return int.Parse(C.ReadLine());}static void Main(){var s="[[";for(int i=R(),j;i-->0;)for(j=R();j-->0;s+=j>0?", ":i>0?"], [":"]]")s+=R();C.Write(s);}}

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