#include <stdio.h>
#include <string.h>

int quin2dec(char *str)
{
	int	i, value = 0;
	char	s[] = "rhfmy";
	char	*p;

	for (i = 0; i < 4; i++) {
		if (str[i] == '\0') {
			break;
		}
		p = strchr(s, str[i]);
		if (p == NULL) {
			fprintf(stderr, "error\n");
			exit(1);
		}
		value = value * 5 + (p - s);
	}
	return value;
}

int main()
{
	char	str[5];
	int	i;

	scanf("%4s", str);
	i = quin2dec(str);
	printf("%d\n", i);
	return 0;
}