using System;

public class Program

{

    static void findCombinationsUtil(int []arr, int index,  

                                 int num, int reducedNum)  

{  

    if (reducedNum < 0)  

        return;  

    if (reducedNum == 0)  

    {  

        for (int i = 0; i < index; i++)  

            Console.Write (arr[i] + " ");  

            Console.WriteLine();  

        return;  

    }    

    int prev = (index == 0) ?  

                          2 : arr[index - 1];  

    for (int k = prev; k <= 7 ; k++)  

    {  

        arr[index] = k;  

        findCombinationsUtil(arr, index + 1, num, reducedNum - k);  

    }  

}  

static void findCombinations(int n)  

{   

    int []arr = new int [n];  

    findCombinationsUtil(arr, 0, n, n);  

}

    public static void Main()

    {

        int n = 10;

        findCombinations(n);

    }

}