N, A, B, C = map(int, input().split())

ans = [[-1]*N for _ in range(N)]
for m in range(2):
    for i in range(N):
        for j in range(N):
            if (i+j)%2 == m and 1 <= A:
                ans[i][j] = 1
                A -= 1
for m in reversed(range(2)):
    for i in reversed(range(N)):
        for j in reversed(range(N)):
            if (i+j)%2 == m and 1 <= C:
                ans[i][j] = 3
                C -= 1
for i in range(N):
    for j in range(N):
        if ans[i][j] == -1:
            ans[i][j] = 2

for a in ans:
    print("".join(map(str, a)))