w, h, x = map(int, input().split())
d = [[0] * 3 for _ in range(3)]
for i in range(3):
    for j in range(3):
        if h % 3 != i % 3 != 2 and w % 3 != j % 3 != 2:
            d[i][j] = min(x, 9)
            x -= d[i][j]
if x:
    print(-1)
    exit()
ans = []
for i in range(h):
    ans.append([])
    for j in range(w):
        ans[-1].append(d[i%3][j%3])

for t in ans:
    for x in t:
        print(x, end='')
    print()