import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		for(int i=10; i<=99; i++) {
			int n = i%10;
			int m = i/10;
			if((n+m)+(n*m)==(m*10+n)) {
				System.out.println(i);
			}
			
		}
	}

}

/**************************************************************
	Problem: 1722
	User: admin
	Language: Java
	Result: Accepted
	Time:254 ms
	Memory:34592 kb
****************************************************************/