#include<bits/stdc++.h>
using namespace std;
const int N=210;
char s1[N],s2[N];
int main()
{
    cin.getline(s1,N);
    int n=strlen(s1);
    int cnt=0;
    for(int i=0;i<n;i++)
    {
        if(s1[i]!=' ')
        {
            s2[cnt++]=s1[i];
            continue;
        }
        else
        {
            int j=i;
            s2[cnt++]=s1[i];
            while(j<n&&s1[j]==' ')j++;
            j--;
            i=j;
        }
    }
    cout<<s2;
    return 0;
}