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  1. Prepare
  2. Java
  3. Strings
  4. Pattern Syntax Checker

Pattern Syntax Checker

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Using Regex, we can easily match or search for patterns in a text. Before searching for a pattern, we have to specify one using some well-defined syntax.

In this problem, you are given a pattern. You have to check whether the syntax of the given pattern is valid.

Note: In this problem, a regex is only valid if you can compile it using the Pattern.compile method.

Input Format

The first line of input contains an integer , denoting the number of test cases. The next lines contain a string of any printable characters representing the pattern of a regex.

Output Format

For each test case, print Valid if the syntax of the given pattern is correct. Otherwise, print Invalid. Do not print the quotes.

Sample Input

3
([A-Z])(.+)
[AZ[a-z](a-z)
batcatpat(nat

Sample Output

Valid
Invalid
Invalid

Author

akashs_csedu

Difficulty

Easy

Max Score

20

Submitted By

134098

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