Submission #162122

---

Source Code Expand

#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;

int main(void){

	string s;
	cin >> s;
	int n=s.size();
	if(n==1 && s[0]=='a') cout << -1 << endl;
	else cout << "a" << endl;

	return 0;
}

Submission Info

Judge Result