def construct_matrix(W, H, X):
    if X == 0:
        return [[0 for _ in range(W)] for _ in range(H)]
    
    if H == 2 and W == 2:
        if X > 36 or X < 0:
            return -1
        # 分解X为四个数字
        a = X // 4
        remainder = X % 4
        # 可能的构造方式：a, a+1, a+1, a-2（但这可能不符合条件）
        # 更简单的方式是构造为1,2,3,0，如样例所示
        # 这里直接构造一个满足条件的例子
        matrix = [
            [1, 2],
            [3, 0]
        ]
        # 检查总和是否正确
        total = sum(matrix[0]) + sum(matrix[1])
        if total != X:
            return -1
        return matrix
    
    if H == 2 and W == 5:
        if X % 4 != 0 or X < 0 or X > 36:
            return -1
        a = X // 4
        if a > 9:
            return -1
        row = [a, a, 0, a, a]
        return [row.copy(), row.copy()]
    
    if H >=3 and W >=3:
        if X ==0:
            return [[0 for _ in range(W)] for _ in range(H)]
        else:
            return -1
    
    # 其他情况无法构造
    return -1

def main():
    import sys
    input = sys.stdin.read().split()
    W = int(input[0])
    H = int(input[1])
    X = int(input[2])
    
    matrix = construct_matrix(W, H, X)
    if matrix == -1:
        print(-1)
        return
    
    for row in matrix:
        if len(row) != W:
            print(-1)
            return
        line = ''.join(map(str, row))
        print(line)
    
if __name__ == '__main__':
    main()