#include<bits/stdc++.h>
using namespace std;
int main()
{
	char s[110],a[10];
	int n=0,i;
	gets(s);
	if(s[0]!=0){
		a[n]=s[0]-' ';
		n++;	
	}
	for(i=0;i<strlen(s);i++){
		if(s[i]==' '){
			a[n]=s[i+1]-' ';
			n++;
		}
	}
	for(i=0;i<n;i++){
		cout<<a[i];
	}
	return 0;
}

/**************************************************************
	Problem: 1100
	User: zzz
	Language: C++
	Result: Wrong Answer
****************************************************************/