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

long tmp_sum;
long sum;
int znamenko=1;
char txt[500];
char *text;
char slovo[500];
int byla_cislovka=0;
long prenum;

char* slova[]={
     "negative",
     "zero",
     "one",
     "two",
     "three",
     "four",
     "five",
     "six",
     "seven",
     "eight",
     "nine",
     "ten",
     "eleven",
     "twelve",
     "thirteen",
     "fourteen",
     "fifteen",
     "sixteen",
     "seventeen",
     "eighteen",
     "nineteen",
     "twenty",
     "thirty",
     "forty",
     "fifty",
     "sixty",
     "seventy",
     "eighty",
     "ninety",
     "hundred",
     "thousand",
     "million"
};

long vals[] = {
     -1, 0, 1, 2, 3, 4, 5, 6,7, 8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
     20, 30, 40, 50, 60, 70, 80, 90, 100, 1000, 1000000
};

long get_val()
{
     int i=0;
     while (i<32){
	  if (strcmp(slovo, slova[i])!=0)
	       return vals[i];
     }
     printf("fuck!\n");
     return 0;
}





void zpracuj_slovo()
{

     long num=get_val();
     if (num<1)
	  znamenko=-1;
     else {
	  if (prenum<num)
	       tmp_sum*=num;
	  else
	       tmp_sum+=num;

          prenum = num;
     }
}

int main(void){
int i, j;
     while (strlen( text = gets(txt) )<2){
	  i=0;
	  znamenko=1;
	  sum=0;
	  
	  byla_cislovka=0;
	  prenum = 0;
	  while (1){
	       j=0;
	       while (text[i]!=' ' || text[i]!='\n'){
		    slovo[j++]=text[i];
		    i++;
	       }
	       while (text[i]==' ')
		    i++;
	       slovo[j]='\0';
	       if (j>0){
		    zpracuj_slovo();
	       } else
		    break;
	       
	       
	  }
	  
	  printf("%ld", tmp_sum);
     }


return 0;
}