#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

int main()
{
    ifstream input("input.txt");
    int N;
    int count;
    int res=0;

    vector<int> mas;
    int  s1, s2, s3;
    int sum;
    input >> N;
    input >> count;
    for (int i=0;i<N;i++)
    {
        input >> s1 >> s2 >> s3;
        if (s1 >= 40 && s2 >= 40 && s3 >= 40)
        {
            res++;
            sum = s1 + s2 + s3;
            mas.push_back(sum);
        }
    }
    input.close();
    for (int i = 0; i < res - 1; i++)
    {
        for (int j = res - 1; j >= i; j--)
        {
            if (mas[i] > mas[j])
            {
                s1 = mas[i];
                mas[i] = mas[j];
                mas[j] = s1;
            }
        }
    }
    ofstream output("output.txt");
    if (res - count - 1 >= 0)
    {
        if (mas[res - count] == mas[res - count - 1])
        {
            for (int i = res - count; i<res; i++)
            {
                if (mas[i] != mas[res - count])
                {
                    output << mas[i];
                    break;
                }
            }
        }
        else
        {
            output << mas[res - count];
        }
    }
    else
    {
        output << mas[res - count];
    }
    output.close();
    return 0;
}