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// https://www.hackerrank.com/challenges/pattern-syntax-checker/problem

import java.util.Scanner;

import java.util.regex.Pattern;

import java.util.regex.PatternSyntaxException;

public class PatternSyntaxChecker {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

int queries = scanner.nextInt();

scanner.nextLine();

while (queries-- > 0) {

String regex = scanner.nextLine();

if (isValidPattern(regex)) {

System.out.println("Valid");

} else {

System.out.println("Invalid");

}

private static boolean isValidPattern(String regex) {

try {

Pattern.compile(regex);

return true;

} catch (PatternSyntaxException exception) {

return false;

}