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

char word[20];
char c;
int a[30];

int compMillion(int i);
int compThousand(int i);
int compHundred(int i);

char* get_word() {
    scanf("%s", word);
    return word;
}

int is_end() {
    c = getc(stdin);
    if(c == '\n')
	return 1;
    else if(c == EOF) 
	return 2;
    else {
	ungetc(c, stdin);
	return 0;
    }
}

int translate(char *number) {
    if(strcmp(number, "negative") == 0) {
	return -1;
    }
    else if(strcmp(number, "zero") == 0) {
	return 0;
    }    
    else if(strcmp(number, "one") == 0) {
	return 1;
    }
    else if(strcmp(number, "two") == 0) {
	return 2;
    }
    else if(strcmp(number, "three") == 0) {
	return 3;
    }
    else if(strcmp(number, "four") == 0) {
	return 4;
    }
    else if(strcmp(number, "five") == 0) {
	return 5;
    }
    else if(strcmp(number, "six") == 0) {
	return 6;
    }
    else if(strcmp(number, "seven") == 0) {
	return 7;
    }
    else if(strcmp(number, "eight") == 0) {
	return 8;
    }
    else if(strcmp(number, "nine") == 0) {
	return 9;
    }
    else if(strcmp(number, "ten") == 0) {
	return 10;
    }
    else if(strcmp(number, "eleven") == 0) {
	return 11;
    }
    else if(strcmp(number, "twelve") == 0) {
	return 12;
    }
    else if(strcmp(number, "thirteen") == 0) {
	return 13;
    }
    else if(strcmp(number, "fourteen") == 0) {
	return 14;
    }
    else if(strcmp(number, "fifteen") == 0) {
	return 15;
    }
    else if(strcmp(number, "sixteen") == 0) {
	return 16;
    }
    else if(strcmp(number, "seventeen") == 0) {
	return 17;
    }
    else if(strcmp(number, "eighteen") == 0) {
	return 18;
    }
    else if(strcmp(number, "nineteen") == 0) {
	return 19;
    }
    else if(strcmp(number, "twenty") == 0) {
	return 20;
    }
    else if(strcmp(number, "thirty") == 0) {
	return 30;
    }
    else if(strcmp(number, "fourty") == 0) {
	return 40;
    }
    else if(strcmp(number, "fifty") == 0) {
	return 50;
    }
    else if(strcmp(number, "sixty") == 0) {
	return 60;
    }
    else if(strcmp(number, "seventy") == 0) {
	return 70;
    }
    else if(strcmp(number, "eighty") == 0) {
	return 80;
    }
    else if(strcmp(number, "ninety") == 0) {
	return 90;
    }
    else if(strcmp(number, "hundred") == 0) {
	return 100;
    }
    else if(strcmp(number, "thousand") == 0) {
	return 1000;
    }
    else if(strcmp(number, "million") == 0) {
	return 1000000;
    }
    else return -5;
}

int compMillion(int k) {
    int el = k - 1, en = 0;
    int em = 0, ef = 0;
    while(a[el] != -2 && el != -1) {
	if (a[el] == 1000) {
	    em = compThousand(el);	
    	}
	el--;
    }
    
    el = k - 1;
    while(a[el] != -2 && el != -1) {
	if (a[el] == 100) {
	    ef = compHundred(el);	
    	}
	el--;
    }

    el = k - 1;
    while(a[el] != -2 && el != -1) {
	en += a[el];
	a[el] = -2;
	el--;
    }
    
    a[k] = -2;


    return (em + ef + en) * 1000000;
}

int compThousand(int k) {
    int el = k - 1, en = 0;
    int em = 0;
    while(a[el] != -2 && el != -1) {
	if (a[el] == 100) {
	    em = compHundred(el);	
    	}
	el--;
    }
    
    el = k - 1;
    while(a[el] != -2 && el != -1) {
	en += a[el];
	a[el] = -2;
	el--;
    }
    
    a[k] = -2;
    
    return (em + en) * 1000;
}

int compHundred(int k) {
    int el = 100 * a[k - 1];
    a[k - 1] = -2;
    a[k] = -2;    
    return el;
}

int main(){
    int sign;
    int num;
    int j, l;


    while(is_end() != 2) {
	j = 0;
	sign = 1;
	while(!is_end()) {
	    a[j++] = translate(get_word());
	}

	if(a[0] == -1) {
	    sign = -1;
	    a[0] = -2;
        }
	
	num = 0;
	
	for(l = 0; l < j; l++)
	    if(a[l] == 1000000)
		num += compMillion(l);	

	for(l = 0; l < j; l++)
	    if(a[l] == 1000)
		num += compThousand(l);	
	for(l = 0; l < j; l++)
	    if(a[l] == 100)
		num += compHundred(l);	

	j--;
	while(a[j] != -2 && j != -1)  {
	    num += a[j];
	    j--;
        }

	printf("%d\n", sign*num);
	if(is_end() == 1)
	    return 0;


    }
    return 0;
}