# xy.xy.  ...  .wz.wz
# w % 3 == 0
# .y..y.
# == 1
# x..x..x
# == 2
# xy.xy.xy

w, h, x = map(int, input().split())
if  w % 3 <= 1 and h % 3 <= 1:
    if x >= 10:
        print(-1)
        exit()
    for i in range(h):
        for j in range(w):
            print(x if i % 3 + h % 3 == 1 and j % 3 + w % 3 == 0 else 0, end='')
        print()
    exit()

ans = []
if h % 3 != 2:
    flipped = True
    h, w = w, h
else:
    flipped = False

d = [[0] * 3 for _ in range(3)]
if w % 3 == 2:
    for i in range(2):
        for j in range(2):
            d[i][j] = min(x, 9)
            x -= d[i][j]
else:
    for i in range(3):
        for j in range(3):
            if not (i % 3 <= 1 and j % 3 + w % 3 == 1):
                continue
            d[i][j] = min(x, 9)
            x -= d[i][j]
if x:
    print(-1)
    exit()

for i in range(h):
    ans.append([])
    for j in range(w):
        ans[-1].append(d[i%3][j%3])

if flipped:
    ans = zip(*ans)
for t in ans:
    for x in t:
        print(x, end='')
    print()