import java.math.BigInteger;
import java.util.Scanner;

public class B394 {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //Кол-во чисел в числе
        int temp = scanner.nextInt();
        BigInteger p = BigInteger.valueOf(temp);
        //Какой-то множитель
        temp = scanner.nextInt();
        BigInteger x = BigInteger.valueOf(temp);
        BigInteger minNumber = BigInteger.valueOf(1);
        while(p.intValue() > 1) {
            minNumber = minNumber.multiply(BigInteger.valueOf(10));
            p = p.subtract(BigInteger.valueOf(1));
        }
        boolean tag = false;
        for(BigInteger i = minNumber; i.compareTo(minNumber.multiply(BigInteger.valueOf(10)).subtract(BigInteger.valueOf(1))) < 0; i = i.add(BigInteger.valueOf(1))) {
            long lastDigit = i.remainder(BigInteger.valueOf(10)).longValue();
            if (lastDigit != 0) {
                BigInteger numberWithoutLast = i.divide(BigInteger.valueOf(10));
                BigInteger checkNumber = minNumber.multiply(BigInteger.valueOf(lastDigit)).add(numberWithoutLast);
                if(x.intValue() != 1) {
                    if(i.multiply(x).equals(checkNumber)) {
                        System.out.println(i);
                        tag = true;
                        break;
                    }
                } else {
                    if(i.equals(checkNumber)){
                        System.out.println(i);
                        tag = true;
                        break;
                    }
                }
            }
        }
        if (!tag) {
            System.out.println("Impossible");
        }
    }
}