void rectangle(int a, int b, char c, int d)
{
	if (d == 0)
	{
		for (int i = 1; i <= b; i++)
		{
			printf("%c", c);
		}
		printf("\n");
		for (int i = 2; i < a; i++)
		{
			printf("%c", c);
			for (int j = 2; j < b; j++)
				printf(" ");
			printf("%c\n", c);
		}
		for (int i = 1; i <= b; i++)
		{
			printf("%c", c);
		}
	}
	else
	{
		for (int i = 1; i <= a; i++)
		{
			for (int j = 1; j <= b; j++)
			{
				printf("%c", c);
			}
			printf("\n");
		}
	}
}

int main()
{
	int a, b, f;
	char c;
	scanf("%d%d %c%d", &a, &b, &c, 1, &f);
	rectangle(a, b, c, f);
}