#include <iostream>

using namespace std;

int main()
{
    int n;
    cin>>n;
    char c;
    cin>>c;
    if(n<3){
        return 0;
    }
    for(int i=0;i<(n+1)/2;i++){
        if(i==0||i==((n+1)/2-1)){
            for(int j=0;j<n;j++){
                cout<<c;
            }
            cout<<"\n";
        }else{
            for(int j=0;j<n;j++){
                if(j==0||j==n-1){
                    cout<<c;
                }else{
                    cout<<" ";
                }
            }
            cout<<"\n";
        }
    }
    return 0;
}