#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n>=10000&&n<100000) cout<<"wan";
    else if(n>=100000&&n<1000000) cout<<"shi wan";
    else if(n>=1000000&&n<10000000) cout<<"bai wan";
	else if(n>=10000000&&n<100000000) cout<<"qian wan"; 
	else if(n>=100000000&&n<1000000000)cout<<"yi";
	else if(n>=1000000000) cout<<"shi yi";
}
  
/**************************************************************
	Problem: 1322
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/