#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n;
	cin>>n;
	if(n/1000000000)cout<<"shi yi";
	else if(n/100000000)cout<<"yi";
	else if(n/10000000)cout<<"qian wan";
	else if(n/1000000)cout<<"bai wan";
	else if(n/100000)cout<<"shi wan";
	else if(n/10000)cout<<"wan";


	return 0;
}

/**************************************************************
	Problem: 1322
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/