import java.util.*;
import java.io.*;

public class Main {
    int c[][] = new int[4][13];
    int leader[] = new int[13];
    boolean bad = false;
    
    public void ComputeLeaders(){
	leader[0] = -1;
	if (c[0][0] == 0) leader[0] = 0;
	if (c[1][0] == 0) leader[0] = 1;
	if (c[2][0] == 0) leader[0] = 2;
	if (c[3][0] == 0) leader[0] = 3;
	
	if (leader[0] == -1) return;

	for (int i = 1; i < 13; i++){
	    int winner = leader[i-1];
	    for (int j = 0; j < 4; j++){
		if (c[j][i-1] / 13 == c[winner][i-1] / 13){
		    if (c[j][i-1] % 13 > c[winner][i-1] % 13) winner = j;
		}
	    }
	    leader[i] = winner;
	}
    }

    public boolean dups(){
	boolean temp[] = new boolean[52];
	for (int i = 0; i < 4; i++) for (int j = 0; j < 13; j++) temp[c[i][j]] = true;
	for (int i = 0; i < 52; i++) if (!temp[i]) return true;
	return false;
    }
    
    public boolean Check(){
	/*	for (int i = 0; i < 4; i++){
	    for (int j = 0; j < 13; j++) System.out.print (c[i][j] + " ");
	    System.out.println();
	    }*/
	
	ComputeLeaders();
	if (leader[0] == -1) return false;
	/*	for (int i = 0; i < 13; i++){
	    System.err.print (leader[i] + " ");
	}
	System.err.println();*/

	if (dups()) return false;


	for (int i = 0; i < 13; i++){
	    for (int j = 0; j < 4; j++){
		if (c[j][i] / 13 != c[leader[i]][i] / 13){
		    for (int k = i+1; k < 13; k++){
			if (c[j][k] / 13 == c[leader[i]][i] / 13){
			    return false;
			}
		    }
		}
	    }
	}
	return true;

    }

    public int ParseCard (String s){
	char c = s.charAt(0);
	char d = s.charAt(1);
	int val1 = -1, val2 = -1;
	
	if (c >= '2' && c <= '9') val1 = c - '2';
	else if (c == 'T') val1 = 8;
	else if (c == 'J') val1 = 9;
	else if (c == 'Q') val1 = 10;
	else if (c == 'K') val1 = 11;
	else if (c == 'A') val1 = 12;

	if (d == 'C') val2 = 0;
	else if (d == 'D') val2 = 13;
	else if (d == 'H') val2 = 26;
	else if (d == 'S') val2 = 39;

	if (val1 == -1 || val2 == -1){
	    bad = true;
	    return -1;
	}
	return val1 + val2;
    }

    public void run(){
	try {
	    BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
	    String s = br.readLine();
	    while (s != null){
		bad = false;
		for (int i = 0; i < 4; i++){
		    StringTokenizer st = new StringTokenizer (s);
		    for (int j = 0; j < 13; j++){
			c[i][j] = ParseCard (st.nextToken());
		    }
		    s = br.readLine();
		}

		if (!bad && Check()){
		    System.out.println ("Valid");
		}
		else
		    System.out.println ("Invalid");
	    }

	    br.close();
	}
	catch (Exception e){
	    e.printStackTrace();
	}
    }

    public static void main (String args[]){
	new Main().run();
    }
}