# https://yukicoder.me/problems/no/3765



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

    S = [[-1] * N for _ in range(N)]

    b_last = None
    for i in range(N):
        for j in range(N):
            if B > 0:
                S[i][j] = 2
                B -= 1
                b_last = (i, j)

    if A > 1:
        for di, dj in ((0, 1), (1, 0)):
            new_i = b_last[0] + di
            new_j = b_last[1] + dj
            if 0 <= new_i < N and 0 <= new_j < N:
                S[new_i][new_j] = 1
                A -= 1
    elif C > 1:
        for di, dj in ((0, 1), (1, 0)):
            new_i = b_last[0] + di
            new_j = b_last[1] + dj
            if 0 <= new_i < N and 0 <= new_j < N:
                S[new_i][new_j] = 3
                C -= 1

    for i in range(N):
        for j in range(N):
            if S[i][j] == -1:
                if A > 0:
                    S[i][j] = 1
                    A -= 1
                elif C >0:
                    S[i][j] = 3
                    C -= 1


    for i in range(N):
        print("".join(map(str, S[i])))









if __name__ == "__main__":
    main()