#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a=0;
	cin>>n;
    while(n%10!=0){
    	n=n/10;
    	a++;
}
    switch(a){
    	case 5:
		    cout<<"wan";
		    break;
    	case 6:
		    cout<<"shi wan";
			break; 
    	case 7:
		    cout<<"bai wan";
		    break;
    	case 8:
		    cout<<"qian wan"; 
		    break;
    	case 9:
		    cout<<"yi" ; 
		    break;
    	case 10:
		    cout<<"shi yi" ;
			break; 
    }
    	

    
}
/**************************************************************
	Problem: 1322
	User: lvrenxiang
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/