#include<bits/stdc++.h>
using namespace std;
int a;
int main(){
	cin>>a;
	if(a>=10000&&a<100000) cout<<"wan";
	if(a>=100000&&a<1000000) cout<<"shi wan";
	if(a>=1000000&&a<10000000) cout<<"bai wan";
	if(a>=10000000&&a<100000000) cout<<"qian wan";
	if(a>=100000000&&a<1000000000) cout<<"yi";
	if(a>=1000000000&&a<10000000000) cout<<"shi yi";
	return 0;
}

/**************************************************************
	Problem: 1322
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/