//BufferedReader is faster than scanner as it doesn't parse the text. Iterated over 1000 times, it saves 30 seconds in total.
import java.io.BufferedReader;
import java.io.InputStreamReader;

class Even20To100 {
    public static void main(String[] args) throws java.io.IOException {
    
    
	    for(int i = 0; i <= 100;i++){
	    if (i % 2 == 0){
	    System.out.print(i + " ");
	    } 
	    }
    }}