#include <stdio.h>

int main()
{
	char m[3];
	double s,sum;
	int i;
	while(1)
	{
	scanf("%c.%c%c",&m[0],&m[1],&m[2]);
	fflush(stdin);
    if(m[0]=='0'&&m[1]=='0'&&m[2]=='0')break;
	
		s=0;
		s=m[0]-'0'+(m[1]-'0')/10.0+(m[2]-'0')/100.0;
		sum=0;
		i=2;
		while(sum<s)
		{
		 sum=sum+1.0/i;
		 i++;
		}
		printf("%d card(s)\n",i-2);
	}
	return 0;
}