//import java.util.*;

public class ONE{

public static void main(String args[]) {

int n=4;

for(int i=1;i<=n;i++){

for(int j=1;j<= n-i;j++){  
   System.out.print(" ");

}

for(int j=1;j<=2i-1;j++){ System.out.print("");

} System.out.println(); } for(int i=n;i>=1;i--){

for(int j=1;j<= n-i;j++){  
   System.out.print(" ");

}

for(int j=1;j<=2i-1;j++){ System.out.print("");

} System.out.println(); }

   }
  }