#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,d;
	char c;
	int e=0,f=0;
	cin>>a>>b>>c>>d;
	if(d==0)
	{
		while(d<a)
		{
			while(f<b)
			{
				if(d==0)
				{
					cout<<c;
				}
				else if(d==a-1)
				{
					cout<<c;
				}
				else
				{
					if(f==0)
					{
						cout<<c;
					}
					else if(f==b-1)
					{
						cout<<c;
					}
					else
					{
						cout<<" ";
					}
				}
				f++;
			}
			f=0;
			cout<<endl;
			d++;
		}
	}
	else
	{
		while(d<a)
		{
			while(f<b)
			{
				cout<<c;
				f++;
			}
			f=0;
			cout<<endl;
			d++;
		}
	}
	return 0;
}