#include<bits/stdc++.h>
using namespace std;
int main() {
    int a,b,c;
    cin>>a>>b>>c;
    if(a>=16&&a<=19&&b>=50&&b<=80&&c>=165&&c<=185){
    	cout<<"Y";
    }else{
    	cout<<"n";
    }
}
/**************************************************************
	Problem: 1661
	User: yangjunwen
	Language: C++
	Result: Wrong Answer
****************************************************************/