Problem:
Finding Missing Cards

Taro is going to play a card game. However, now he has only n cards, even though there should be 52 cards (he has no Jokers).

The 52 cards include 13 ranks of each of the four suits: spade, heart, club and diamond.

Input

In the first line, the number of cards n (n ≤ 52) is given.

In the following n lines, data of the n cards are given. Each card is given by a pair of a character and an integer which represent its suit and rank respectively. A suit is represented by 'S', 'H', 'C' and 'D' for spades, hearts, clubs and diamonds respectively. A rank is represented by an integer from 1 to 13.

Output

Print the missing cards. The same as the input format, each card should be printed with a character and an integer separated by a space character in a line.
Arrange the missing cards in the following priorities:

Print cards of spades, hearts, clubs and diamonds in this order.

If the suits are equal, print cards with lower ranks first.

Sample Input

47
S 10
S 11
S 12
S 13
H 1
H 2
S 6
S 7
S 8
S 9
H 6
H 8
H 9
H 10
H 11
H 4
H 5
S 2
S 3
S 4
S 5
H 12
H 13
C 1
C 2
D 1
D 2
D 3
D 4
D 5
D 6
D 7
C 3
C 4
C 5
C 6
C 7
C 8
C 9
C 10
C 11
C 13
D 9
D 10
D 11
D 12
D 13

Sample Output

S 1
H 3
H 7
C 12
D 8

Note

      解説

Solution in C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Prac
{
    public struct Cards
    {
        public int n ;
        public string suit;
        public Cards(String suit, int n)
        {
            this.suit = suit;
            this.n = n;
        }
        public override String ToString()
        {
            return suit + " " + n.ToString();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var cards = new Dictionary<Cards,bool>();
            for (var i = 0; i < 52; i++)
            {
                switch (i / 13)
                {
                    case 0:
                        cards.Add(new Cards("S", i+1), false);
                        break;
                    case 1:
                        cards.Add(new Cards("H", (i%13)+1), false);
                        break;
                    case 2:
                        cards.Add(new Cards("C", (i % 13) + 1), false);
                        break;
                    case 3:
                        cards.Add(new Cards("D", (i % 13) + 1), false);
                        break;
                }
            }
            var temp = new string[2];
            for (var i = 0; i < n; i++)
            {
                temp = Console.ReadLine().Split(' ');
                cards[new Cards(temp[0], int.Parse(temp[1]))] = true;
            }
            foreach (var c in cards)
            {
                if (c.Value == false)
                {
                    Console.WriteLine(c.Key.ToString());
                }
            }


        }
    }
}