import java.util.Scanner;

class No_722{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		
		int n = 0;
		int m = 0;
		int al = Math.abs(a);
		int bl = Math.abs(b);
		
		for(int i= 0;al >= 10;i++){
		al /= 10;
		n++;
		}
		
		for(int i = 0;bl >= 10;i++){
		bl /= 10;
		m++;
		}
		
		if((n >= 2&&a % Math.pow(10,n) == 0)&&(m >= 2&&b % Math.pow(10,m) == 0)) {
			System.out.println((long)a * b / 10);
		}else if(a * b < -99999999 || a * b > 99999999) {
			System.out.println("E");
		}else {
			System.out.println(a * b);
		}
	}
}