#include <iostream>  
#include <string>     
using namespace std;   
   
void process(string str)   
{   
  //各字符串的下標(biāo)即為其對(duì)應(yīng)的阿拉伯?dāng)?shù)字   
  char *ch[]={"zero","one","two","three","four","five","six","seven","eight","nine","double"}; 
  char *out[100];//存儲(chǔ)結(jié)果集 
 
  int f=0; 
  int i,j,k;  
   
  string substr;   
  int len=str.length();  
  int flag=0;//判斷double出現(xiàn) 
  int flag2=0;//判斷內(nèi)循環(huán)有無(wú)break 
 
  for(i=0;i<len;i++)   
  {  
    if(flag2) 
      break; 
    else if(str[i]<97 || str[i]>122)//非字母字符 
    { 
      out[f++]="error"; 
      break; 
    } 
    else{ 
      //可以看出拼音最短為3個(gè)字符，最長(zhǎng)為6個(gè)字符   
      for(j=i+2;j<len&&(j-i)<6;j++)   
      {   
        substr=str.substr(i,j-i+1);   
        if(!substr.compare(ch[10]))//出現(xiàn)double 
        { 
          if(i==len-6)//最后一個(gè)double 
          { 
            out[f++]="error"; 
            flag2=1; 
            break; 
          }else if(flag){//連續(xù)兩個(gè)double 
            out[f++]="error"; 
            flag2=1; 
            break; 
          }else 
            flag=1; 
        } 
        else{ 
          for(k=0;k<10;k++)  
          { 
            if(!substr.compare(ch[k]))   
            {   
              if(flag){ 
                out[f++]=ch[k]; 
                out[f++]=ch[k]; 
                flag=0; 
                break;                
              } 
              else{ 
                out[f++]=ch[k];   
                break; 
              } 
            }  
          } 
        } 
      }  
    } 
  }  
   
  int flag3=0;//看有無(wú)error,默認(rèn)沒有error 
  for(int r=0;r<f;r++){ 
    if(out[r]=="error")//有error 
      flag3=1; 
  } 
 
  if(!flag3) 
    for(r=0;r<f;r++) 
      for(k=0;k<10;k++)  
      { 
        if(out[r]==ch[k])   
          printf("%d",k); 
      } 
  else 
    printf("error"); 
 
  printf("\n");  
}   
   
void main()  
{  
  string str;   
  while(getline(cin,str))  
    process(str);  
}