w,h,x = map(int,input().split())
if x>36:
    print(-1)
else:
    y = x//9
    z = x%9
    m = [[0 for _ in range(w)]for __ in range(h)]
    for i in range(h):
        for j in range(w):
            if i%3 == 0:
                if j%3 == 0:
                    m[i][j] = y+z
            else:
                m[i][j] = y
    for i in range(h):
        for j in range(w):
            print(m[i][j],end = "")
        print()