#include<bits/stdc++.h>;
using namespace std;
int main()
{
	 int t;
	 cin>>t;
	 getchar();
	 int i;
	 string s;
	 while(t--)
	 {
		 getline(cin,s);
 
		 string temp;
		 vector <string> cds;
         stringstream ss (s);
         while(ss >> temp)//please explain what is being done in this line 
         cds.push_back(temp);
         reverse(cds.begin(),cds.end());
         for(i=0;i<cds.size();i++)
         {
			 cout<<cds[i]<<" ";
		 }
		 cout<<endl;
		 //* */
	 }
	 return 0;
 }
 

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MQpoZWxsbyB3b3JsZA==

1
hello world