#include "stdafx.h"
#include<iostream>
using namespace std;


int main(int argc, char* argv[])
{
	float x,t;
	float i; 
	cin>>x;
	while(x)
	{
		t=0;
		for(i=2;;i+=1)
		{
			t+=1/i;
		 if(x<=t)
		break;
		}
		cout<<(i-1)<<" "<<"card(s)"<<endl;
		cin>>x;
	}


	return 0;
}