/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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 s = "one=1&two=2";
		Pattern patt = Pattern.compile("\\w+=\\w+(?:&\\w+=\\w+)*");
		Matcher m = patt.matcher(s);
		if(m.matches()) {
			System.out.println("true");
		} else System.out.println("false");
 
 
	}
}

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