#nclude<bits/stdc++.h>
#define D(x) cout<<"D:"<<#x<<'='<<x<<endl;
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
template<typename tn> inline tn next(void)
{
	tn k;
	cin>>k;
	return k;
}
template<typename tn> inline ostream& operator << (ostream& os, const vector<tn>& v)
{
	for(int i = 0; (unsigned)i < v.size(); i++) os<<v[i]<<' ';
	return os;
}
int main(void)
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout<<R"(aa
ab)"<<endl;
	return ~~(0-0);
}