/*
TASK:CONTEXT
LANG:C++
*/
#include<iostream>
#include<string>
using namespace std;
int main ()
{
    string s,s1,s2,s3;
    char ch;
    int n,x,k,i,l=0;
    cin>>n;
    
    cin>>s;
    cin.get(ch);
    getline(cin,s1);
    x=s1.size();
    for(i=0;i<x;i++)
    {
          if(s1[i]==' '&&l==1)s3+=' ';
          else
          if(s1[i]!=' '){s3+=s1[i];l=1;}
    }
    cout<<s3<<endl;
}
              
