import java.util.Scanner;
import java.util.Arrays;

public class t112409 {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n = in.nextInt();
        String[] s = new String[n];

        for (int i = 0; i < n; ++i) {
            in.next();
            s[i] = in.next();
        }

        Arrays.sort(s);

        for (int i = 0; i < n; ++i) {
            System.out.print((i + 1) + ". ");
            System.out.println(s[i]);
        }

        in.close();
    }
}