/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String input = "abggab";
		System.out.println(gHappy("abggab"));
		System.out.println(gHappy("gbggab"));
		System.out.println(gHappy("gbga"));
		System.out.println(gHappy("abggabgg"));
		System.out.println(gHappy("ggasdfasdf"));
		System.out.println(gHappy("ggasdfasdfg"));
	}
 
	public static boolean gHappy(String input) {
		// make sure input matches two g's in a row, but not a lone g
		return input.matches(".*gg.*") && !input.matches(".*(?<!g)g(?!g).*");
	}
}

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