#include <iostream>
using namespace std;
int main()
{
	long int n;
	cin>>n;
	if(n >= 10000 && n <= 9999999999)
	{
		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
			cout<<"shi yi";
	}
	
	return 0;
} 
/**************************************************************
	Problem: 1322
	User: admin
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/