import java.util.*;
public class PrintHollowTriangle {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter no of rows");
int n = sc.nextInt();
System.out.println("Enter no of column");
int m = sc.nextInt();
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (i == 1 || j == 1 || i == n || j == m) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
}
}
