#include<bits/stdc++.h>
using namespace std;
int main()
{
    char s[110],a[10];
    int n=0,i;
    gets(s);
    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: xuanhua
	Language: C++
	Result: Wrong Answer
****************************************************************/