#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for (int i = 0; i < n; i++)


int main() {
    int n, d, ans = 0;
    cin >> n >> d;
    REP(i,n){
        int p;
        cin >> p;
        ans += max(0, p-d);
    }
    if(ans > 0){
        cout << ans << endl;
    }
    else {
        cout << "kusoge" << endl;
    }
    return 0;
}
