#include<iostream>
#include<cstdio>
#include<sstream>
#include<string>
#include<vector>
using namespace std;
int main()
{
	freopen("abbreviation.in","r",stdin);
	freopen("abbreviation.out","w",stdout);
 string line,word;
 vector<string> st;
 vector<string>::iterator it;
 int size,i;
 int tl;
 string tmp,tmp1,tmp2;
 while(getline(cin,line))
 {
  st.clear();
  istringstream stream(line);
  while(stream>>word)
  {
   if(word!="a"&&word!="an"&&word!="the"&&word!="of"&&word!="and"&&word!="for"&&word!="A"&&word!="An"&&word!="The"&&word!="Of"&&word!="And"&&word!="For"&&word!="AN"&&word!="THE"&&word!="OF"&&word!="AND"&&word!="FOR")
   {
    size=word.size();
    for(i=0,tl=0;i<size;i++,tl++)
    {
     if(word[i]=='-')
      break;
    }
    if(i==size)
    {
     tmp=word[0];
     st.push_back(tmp);
    }
    else 
    {
     tmp1=word.substr(0,tl);
     tmp=tmp1[0];
     st.push_back(tmp);
     tmp2=word.substr(tl+1,size-tl);
     tmp=tmp2[0];
     st.push_back(tmp);
    }
   }
  }
  for(it=st.begin();it!=st.end();it++)
  {
   cout<<*it;
  }
  cout<<endl;
 }
 return 0;
}