SnowFlake

package exams.january2018;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class P03_Snowflake {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        String firstLine = reader.readLine();
        String secondLine = reader.readLine();
        String thirdLine = reader.readLine();
        String fourthLine = reader.readLine();
        String fifthLine = reader.readLine();

        String surfaceRegex = "^([^a-zA-Z0-9]+)$";
        String mantleRegex = "^([0-9_]+)$";
        String middleRegex = "^([^a-zA-Z0-9]+)([0-9_]+)([a-zA-Z]+)([0-9_]+)([^a-zA-Z0-9]+)$";

        Pattern firstSurfacePattern = Pattern.compile(surfaceRegex);
        Matcher firstSurfaceMatcher = firstSurfacePattern.matcher(firstLine);

        Pattern firstMantlePattern = Pattern.compile(mantleRegex);
        Matcher firstMantleMatcher = firstMantlePattern.matcher(secondLine);

        Pattern middlePattern = Pattern.compile(middleRegex);
        Matcher middleMatcher = middlePattern.matcher(thirdLine);

        Pattern secondMantlePattern = Pattern.compile(mantleRegex);
        Matcher secondMantleMatcher = secondMantlePattern.matcher(fourthLine);

        Pattern secondSurfacePattern = Pattern.compile(surfaceRegex);
        Matcher secondSurfaceMatcher = secondSurfacePattern.matcher(fifthLine);

        boolean firstRow = firstSurfaceMatcher.find();
        boolean secondRow = firstMantleMatcher.find();
        boolean thirdRow = middleMatcher.find();
        boolean fourthRow = secondMantleMatcher.find();
        boolean fifthRow = secondSurfaceMatcher.find();

        if (firstRow && secondRow && thirdRow && fourthRow && fifthRow) {
            System.out.println("Valid");
            System.out.println(middleMatcher.group(3).length());
        } else {
            System.out.println("Invalid");
        }
    }
}