#include<iostream>
using namespace std;

int main()
{
	double sum=0.0,num=0.0;
	int i=2;
	while(cin>>num)
	{
		
		if(num == 0.00)
		 break;
		else{
		
         sum=0.0;
         i=2;
	    while(sum<=num)
		{
        sum+=1.0/i;
	    i++;
		}
    	cout<<(i-2)<<" "<<"card(s)"<<endl;
		}
		
	}
	return 0;

}