/* 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)
	{
		boolean run = true;
		try(Scanner scanner = new Scanner(System.in))
		{
			while (run) 
			{
				System.out.println("Another action? [Y/N]");
				while (!scanner.hasNext("[YyNnFf]")) {
				    System.out.println("Incorrect input");
			            	scanner.next();
				}
				String choice = scanner.next();
				if (choice.toLowerCase().equalsIgnoreCase("f"))
			            	run = false;
			}
		}
	}
}

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WSB5IG8gQSBOIG4gRg==

Y y o A N n F