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