#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0;i<((int)(n));i++)
#define reg(i,a,b) for(int i = ((int)(a));i<=((int)(b));i++)
#define irep(i,n) for(int i = ((int)(n)-1);i>=0;i--)
#define ireg(i,a,b) for(int i = ((int)(b));i>=((int)(a));i--)
typedef long long ll;
typedef pair<ll, ll> mp;
ll mod = 1e9+7;

/*
*/

ll n;
string s[100],a;

int main(void){
	cin>>n;
	rep(i,n){
		cin>>s[i]>>a;
		s[i]+=" "+a;
	}
	sort(s,s+n);
	rep(i,n){
		cout<<s[i]<<endl;
	}
	return 0;
}