#include <iostream> using namespace std; int a,b,f; char c; int main() { cin>>a>>b>>c>>f; for(int i=0;i<a;i++){ for(int j=0;j<b;j++){ if(i!=0&&i!=a-1&&j!=0&&j!=b-1){ if(f=0) { cout<<" "; } else cout<<c; } else cout<<c; } cout<<endl; } return 0; }