#include <stdio.h>
#define N 1024
 

int quin2dec(char *s, int n) {
	int m;
	if (!s || !*s)
		return n;
  
	m = 0;
	switch (*s) {

	case 'y':
	m++;
	case 'm':
	m++;
	case 'f':
	m++;
	case 'h':
	m++;
	case 'r':
	break;
  
	default:
	m = -1;
	break;
		     }
	
	if (m < 0)
		return quin2dec(0, -1);
		return quin2dec(s + 1, 5 * n + m);
				}
 
void chop(char *s) {
	char *p;
  
	for (p = s; *p; p++);
		p--;
  
	while (*p == '\n' || *p == '\r')
		*(p--) = 0;
		   }
 
int main() {
	static char buff[N];
	int n;
	printf("> "); fgets(buff, N, stdin);
	chop(buff);
  
	n = quin2dec(buff, 0);

	if (n >= 0)
		printf("%d\n", n);

	else
		printf("error.\n");
  		return 0;

	  }

> 0