#include<iostream>
#include<utility>
#include<string>
#include<algorithm>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
using namespace std;int n;pair<string,string>a[60];int main(){cin>>n;rep(i,n)cin>>a[i].first>>a[i].second;sort(a,a+n);rep(i,n)cout<<a[i].first<<" "<<a[i].second<<endl;}