/*  -*- coding: utf-8 -*-
 *
 * 2799.cc: Yamanote-line Game
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 1000;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n, d;
  scanf("%d%d", &n, &d);

  int sum = 0;
  for (int i = 0; i < n; i++) {
    int pi;
    scanf("%d", &pi);
    if (pi > d) sum += pi - d;
  }

  if (sum == 0) puts("kusoge");
  else printf("%d\n", sum);
  return 0;
}

