import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(validateName("Dąb_rośnie$gdzieś#tu"));
		System.out.println(validateName("Some_string_here"));
	}
	private static boolean validateName(String name) { 
		if (name.matches("(?U)\\p{L}+(?:[\\W_]\\p{L}+)*")) { 
			return true; 
		} 
		return false; 
	} 
}