#include <iostream>
using namespace std;

int main() 
{
    //Number of Rows
    int N=5;

    //Variables to store number of spaces and stars
    int spaces=2*N-1;
    int stars=0;

    //The outer loop will run for (2*N-1) times
    for(int i=1;i<=2*N-1;i++){
        //Upper half of the butterfly
        if(i<=N){
            spaces=spaces-2;
            stars++;
        }
        //Lower half of the butterfly
        else{
            spaces=spaces+2;
            stars--;
        }
        //Print stars
        for(int j=1;j<=stars;j++){
            cout<<"*";
        }
        //Print spaces
        for(int j=1;j<=spaces;j++){
            cout<<" ";
        }
        //Print stars
        for(int j=1;j<=stars;j++){
            if(j!=N){
                cout<< "*";
            }
        }
        cout<< "\n";
    }
    
    return 0;
}