# https://github.com/robe2222555/atcoder-lib/blob/main/template/python/main.py
import sys
input = lambda: sys.stdin.readline().rstrip()
def LI(): return list(map(int, input().split()))
def II(): return int(input())


def solve():
	N,a,b,c = LI()
	if N==2:
		if b==2:
			print("22")
			print("31")
		elif a==2:
			print("13")
			print("21")
		else:
			print("32")
			print("13")
		return

	if a>=N:
		ans = [["" for _ in range(N)] for _ in range(N)]
		for i in range(N):
			for j in range(N):
				if b>0:
					ans[i][j] = "2"
					b -= 1
				elif a>0:
					ans[i][j] = "1"
					a -= 1
				else:
					ans[i][j] = "3"
					c -= 1
		for i in range(N):
			print("".join(ans[i]))
		return

	if c>=N:
		ans = [["" for _ in range(N)] for _ in range(N)]
		for i in range(N):
			for j in range(N):
				if b>0:
					ans[i][j] = "2"
					b -= 1
				elif c>0:
					ans[i][j] = "3"
					c -= 1
				else:
					ans[i][j] = "1"
					a -= 1
		for i in range(N):
			print("".join(ans[i]))
		return

	assert a<N and c<N
	ans = [["2" for _ in range(N)] for _ in range(N)]
	if a<=c:
		for i in range(a):
			ans[0][i] = "1"
			ans[1][i] = "3"
			c -= 1

		for i in range(c):
			ans[2][i] = "3"

	else:
		for i in range(c):
			ans[0][i] = "3"
			ans[1][i] = "1"
			a -= 1

		for i in range(a):
			ans[2][i] = "1"
	for i in range(N):
		print("".join(ans[i]))
	return


def main():
	T = 1
	for _ in range(T):
		solve()
	return


if __name__ == '__main__':
	main()