mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    W, H, X = map(int, input().split())

    if X == 0:
        for _ in range(H):
            print("0" * W)
        exit()

    if X > 36:
        print(-1)
        exit()
    
    a = min(X, 9)
    X -= a
    b = min(X, 9)
    X -= b
    c = min(X, 9)
    X -= c
    d = X
    ans = [[0] * W for _ in range(H)]
    if H%3 == 2 and W%3 == 2:
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 0:
                    ans[h][w] = a
                elif h%3 == 0 and w%3 == 1:
                    ans[h][w] = b
                elif h%3 == 1 and w%3 == 0:
                    ans[h][w] = c
                elif h%3 == 1 and w%3 == 1:
                    ans[h][w] = d
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 2 and W%3 == 1:
        if c:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 0:
                    ans[h][w] = a
                elif h%3 == 1 and w%3 == 0:
                    ans[h][w] = b
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 1 and W%3 == 2:
        if c:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 0:
                    ans[h][w] = a
                elif h%3 == 0 and w%3 == 1:
                    ans[h][w] = b
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 1 and W%3 == 1:
        if b:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 0:
                    ans[h][w] = a
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 1 and W%3 == 0:
        if b:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 1:
                    ans[h][w] = a
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 0 and W%3 == 1:
        if b:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 1 and w%3 == 0:
                    ans[h][w] = a
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 0 and W%3 == 0:
        if b:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 1 and w%3 == 1:
                    ans[h][w] = a
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 2 and W%3 == 0:
        if c:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 0 and w%3 == 1:
                    ans[h][w] = a
                elif h%3 == 1 and w%3 == 1:
                    ans[h][w] = b
        for h in range(H):
            print("".join(map(str, ans[h])))
    elif H%3 == 0 and W%3 == 2:
        if c:
            print(-1)
            exit()
        for h in range(H):
            for w in range(W):
                if h%3 == 1 and w%3 == 0:
                    ans[h][w] = a
                elif h%3 == 1 and w%3 == 1:
                    ans[h][w] = b
        for h in range(H):
            print("".join(map(str, ans[h])))


if __name__ == '__main__':
    main()