Submission #1497375

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Source Code Expand

#include <iostream>
#include <complex>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <string>
#include <functional>
#include <cstdlib>

#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define DFOR(i,a) for(int i=(a);i>=0;i--)

using namespace std; 

int main(){
	int i=0;
	char String[11];
	cin>>String;
	if(String[0]=='a'&&String[1]=='\0') puts("-1");
	else puts("a");
	return 0;
}

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