#include<iostream> using namespace std; int main(){ char n; cin>>n; if(n=='a'){ cout<<"apple"<<endl;

}else if(n=='b'){
	cout<<"banana"<<endl;
}else if(n=='c'){
	cout<<"cat"<<endl;
}else if(n=='y'){
	cout<<"yzx_28 nb!"<<endl;
}else{
	cout<<"no"<<endl;
}
return 0;

}