#include<iostream>
#include<sstream>
#include<fstream>
#include<string>
#include<vector>
#include<deque>
#include<queue>
#include<stack>
#include<set>
#include<map>
#include<algorithm>
#include<functional>
#include<utility>
#include<bitset>
#include<cmath>
#include<cstdlib>
#include<ctime>
#include<cstdio>

using namespace std;

#define REP(i,n) for(int i=0;i<int(n);i++)
#define foreach(c,itr) for(__typeof((c).begin()) itr=(c).begin();itr!=(c).end();itr++)
typedef long long ll;
typedef pair<int,int> P;

int main(void){
	int i;

	cin.tie(0);
	ios_base::sync_with_stdio(false);

	int N,d;
	cin >> N >> d;
	vector<int>v(N);
	for(i=0;i<N;i++) cin >> v[i];
	sort(v.begin(),v.end());
	reverse(v.begin(),v.end());

	int ans=0;
	for(i=0;i<N;i++){
		if(v[i]<=d) break;
		else{
			ans+=-d+v[i];
		}
	}

	if(ans<1) cout << "kusoge" << endl;
	else cout << ans << endl;


	return 0;
}