#include <stdio.h>
/* TODO */
#if 0
#define dpf(x) printf x
#else
#define dpf(x) (void)0
#endif
#define dp dpf

/* value of token */
int value(char *s)
{
int c = *s;
int d = *(s + 1);
int e = *(s + 2);
if (c == 'z') return 0;
if (c == 'o') return 1;
if (c == 't') {
 if (d == 'w') {
	if (e == 'o') return 2;
	/* tw? */
	s += 3;
	e = *s;
	if (e == 'l') return 12;
	return 20;
 } else if (d == 'h') {
	if (e == 'r') return 3;
	if (e ==  'o') return 1000;
	s += 5;
	e = *s;
	return e == 'e' ? 13 : 30;
 } else if (d == 'e') return 10;
}

if (c == 'f') {
	if (d == 'o') {
		if (e == 'u') return *(s + 4) == 0 ? 4 : 14;
		return 40;
	} else if (d == 'i') {
		if (e == 'v') return 5;
		return *(s + 4) == 'y' ? 50 : 15;
	}
}
if (c == 's') {
	if (d == 'i') {
		s += 3;
		d = *s;
		e = *(s + 1);
		if (d == 0) return 6;
		if (e == 'e') return 16;
		return 60;
	} else if (d == 'e') {
		s += 5;
		d = *s;
		e = *(s + 1);
		if (d == 0) return 7;
		if (e == 'y') return 70;
		return 17;
	}
}
if (c == 'e') {
	if (d == 'l') return 11;
	s += 5;
	d = *s;
	if (d == 0) return 8;
	if (d == 'y') return 80;
	return 18;
}
if (c == 'n') {
	if (d == 'e') return -1;
	s +=4;
	d = *s;
	e = *(s + 1);
	if (d == 0) return 9;
	if (e == 'y') return 90;
	return 19;		
}
if (c == 'm') return 1000000;
return 100;
}


int main(void)
{
	char str[100];
	char c;
	int x,y,neg;
	while (1) {
		if ((c = getchar()) == '\n') break;
		ungetc(c,stdin);
		c = 0;
		x = 0;
		while (c != '\n') {
			scanf("%[^ \n]%c",str,&c);
			y = value(str);
			dp(("got %s %d\n",str,y));
			if (y == -1) {
				neg = 1;
			} else if (y >= 100) {
				if (x == 0) x = 1;
				x *= y;
			} else x += y;
		}
		if (neg) x = -x;
		printf("%d\n",x);
	}

	return 0;
}