#include <bits/stdc++.h>

using namespace std;
map<string,string>m;
int main(){
int n;
string age ;
string name;
cin>>n;
for (int i=1;i<=n;i++) {

cin>> name >> age;
m[name]=age;

}map<string,string >::iterator it;
for (it=m.begin(); it!= m.end() ;it++){
cout<<it->first <<" "<<it ->second;
}



return 0;

}