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;
//using System.Threading.Tasks;

namespace Finding_Missing_Cards
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            bool[] S = new bool[13];
            bool[] H = new bool[13];
            bool[] D = new bool[13];
            bool[] C = new bool[13];
            for (int i = 0; i < n; ++i)
            {
                var card = Console.ReadLine().Split(' ');
                int num = int.Parse(card[1]);
                switch (card[0])
                {
                    case "S":
                        S[num - 1] = true;
                        break;
                    case "H":
                        H[num - 1] = true;
                        break;
                    case "D":
                        D[num - 1] = true;
                        break;
                    case "C":
                        C[num - 1] = true;
                        break;
                    default:
                        Environment.Exit(-1);
                        break;
                }
            }
            for (int i = 0; i < 13; ++i)
                if (!S[i]) Console.WriteLine("S " + (i + 1));
            for (int i = 0; i < 13; ++i)
                if (!H[i]) Console.WriteLine("H " + (i + 1));
            for (int i = 0; i < 13; ++i)
                if (!C[i]) Console.WriteLine("C " + (i + 1));
            for (int i = 0; i < 13; ++i)
                if (!D[i]) Console.WriteLine("D " + (i + 1));
        }
    }
}