#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>
#include <utility>
#include <queue>
#include <set>
#include <map>
#include <deque>
#include <iomanip>
#include <cstdio>
#include <stack>
#include <numeric>

using namespace std;
typedef  long long ll;
typedef pair<int,int> PII;
typedef vector<int> VI;
typedef vector<VI> VVI;
#define  MP make_pair
#define  PB push_back
#define inf 1000000007
#define mod 1000000007
#define rep(i,n) for(int i=0;i<(int)(n);++i)

int main(){
    int n;
    cin >> n;
    vector<pair<string,string> > s(n);
    rep(i,n)cin >> s[i].first >> s[i].second;
    sort(s.begin(),s.end());
    rep(i,n)cout << s[i].first << " " << s[i].second << endl;
    return 0;
}