#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int ans,flag,lev[10],tmp[10],i,j,s,t,tag;
char c[10],ch;
void fun(){
       int temp;
       if(!strcmp(c,"negative"))flag=1;
       else if(!strcmp(c,"zero")){tag=1;tmp[s++]=0;}
       else if(!strcmp(c,"one")){tag=1;tmp[s++]=1;}
       else if(!strcmp(c,"two")){tag=1;tmp[s++]=2;}
       else if(!strcmp(c,"three")){tag=1;tmp[s++]=3;}
       else if(!strcmp(c,"four")){tag=1;tmp[s++]=4;}
       else if(!strcmp(c,"five")){tag=1;tmp[s++]=5;}
       else if(!strcmp(c,"six")){tag=1;tmp[s++]=6;}
       else if(!strcmp(c,"seven")){tag=1;tmp[s++]=7;}
       else if(!strcmp(c,"eight")){tag=1;tmp[s++]=8;}
       else if(!strcmp(c,"nine")){tag=1;tmp[s++]=9;}
       else if(!strcmp(c,"ten")){tag=1;tmp[s++]=10;}
       else if(!strcmp(c,"eleven")){tag=1;tmp[s++]=11;}
       else if(!strcmp(c,"twelve")){tag=1;tmp[s++]=12;}
       else if(!strcmp(c,"thirteen")){tag=1;tmp[s++]=13;}
       else if(!strcmp(c,"fourteen")){tag=1;tmp[s++]=14;}
       else if(!strcmp(c,"fifteen")){tag=1;tmp[s++]=15;}
       else if(!strcmp(c,"sixteen")){tag=1;tmp[s++]=16;}
       else if(!strcmp(c,"seventeen")){tag=1;tmp[s++]=17;}
       else if(!strcmp(c,"eighteen")){tag=1;tmp[s++]=18;}
       else if(!strcmp(c,"nineteen")){tag=1;tmp[s++]=19;}
       else if(!strcmp(c,"twenty")){tag=0;tmp[s++]=2;lev[t++]=10;}
       else if(!strcmp(c,"thirty")){tag=0;tmp[s++]=3;lev[t++]=10;}
       else if(!strcmp(c,"forty")){tag=0;tmp[s++]=4;lev[t++]=10;}
       else if(!strcmp(c,"fifty")){tag=0;tmp[s++]=5;lev[t++]=10;}
       else if(!strcmp(c,"sixty")){tag=0;tmp[s++]=6;lev[t++]=10;}
       else if(!strcmp(c,"seventy")){tag=0;tmp[s++]=7;lev[t++]=10;}
       else if(!strcmp(c,"eighty")){tag=0;tmp[s++]=8;lev[t++]=10;}
       else if(!strcmp(c,"ninety")){tag=0;tmp[s++]=9;lev[t++]=10;}
       else if(!strcmp(c,"hundred"))
          if(tag){lev[t++]=100;tag=0;} 
          else{
          temp=0;
          for(j=0;j<t;j++)
             if(tmp[j]&&lev[j]<100){
                temp+=tmp[j]*lev[j];
                tmp[j]=0;
             }
             tmp[t-1]=temp;
             lev[t-1]=100;
          }
       else if(!strcmp(c,"thousand"))
       if(tag){lev[t++]=1000;tag=0;}  
       else{
       temp=0;
       for(j=0;j<t;j++)
             if(tmp[j]&&lev[j]<1000){
                temp+=tmp[j]*lev[j];
                tmp[j]=0;
             }
             tmp[t-1]=temp;
             lev[t-1]=1000;
       }
       else if(!strcmp(c,"million"))
          if(tag){lev[t++]=1000000;tag=0;}  
          else{
          temp=0;
          for(j=0;j<t;j++)
             if(tmp[j]&&lev[j]<1000000){
                temp+=tmp[j]*lev[j];
                tmp[j]=0;
             }
             tmp[t-1]=temp;
             lev[t-1]=1000000;
          }
}
int main()
{
  while(scanf("%c",&ch)&&ch!='\n'&&ch!=' '){
    flag=0;s=t=0;
    while(ch!='\n'){
       i=0;
       while(ch!=' '&&ch!='\n'){
          c[i++]=ch;
          ch=getchar();
       }
       c[i]='\0';
       fun();
       if(ch==' ')ch=getchar();
     }
     while(t<s)lev[t++]=1;
     ans=0;
     for(i=1;i<s;i++)
        if(lev[i]>lev[i-1])
            for(j=0;j<i;j++)
               if(tmp[j]&&lev[j]<lev[i]){
                  tmp[i]+=tmp[j]*lev[j];
                  tmp[j]=0;
               }
     for(i=0;i<s;i++)
        ans+=tmp[i]*lev[i];   
     if(flag)putchar('-');
     printf("%d\n",ans);
  }
  system("PAUSE");
  return 0;
}