import sys
input = sys.stdin.readline
W, H, X = map(int, input().split())
res = [[0] * W for _ in range(H)]
if (H % 3) <= 1 or (W % 3) <= 1:
  if H >= 3 and W >= 3:
    if X > 9:
      print(-1)
      exit(0)
    for i in range(H):
      for j in range(W):
        if i % 3 == 1 and j % 3 == 1: res[i][j] = X
  elif H <= 2:
    if H == 1 and X > 9:
      print(-1)
      exit(0)
    if X > 18:
      print(-1)
      exit(0)
    u = min(9, X)
    d = max(0, X - u)
    for j in range(W):
      if j % 3 == 0:
        res[0][j] = u
        if H > 1: res[1][j] = d
  elif W <= 2:
    if W == 1 and W > 9:
      print(-1)
      exit(0)
    if X > 18:
      print(-1)
      exit(0)
    u = min(9, X)
    d = max(0, X - u)
    for i in range(H):
      if i % 3 == 0:
        res[i][0] = u
        if W > 1: res[i][1] = d
else:
  if H >= 2 and W >= 2:
    if X > 36:
      print(-1)
      exit(0)
    unit = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
    x = X
    for i in range(2):
      for j in range(2):
        unit[i][j] = min(9, x)
        x -= unit[i][j]
    for i in range(H):
      for j in range(W): res[i][j] = unit[i % 3][j % 3]
  elif H == 1:
    unit = [0] * 3
    x = X
    for i in range(2):
      unit[i] = min(9, x)
      x -= unit[i]
    for i in range(W): res[0][i] = unit[i % 3]
  elif W == 1:
    unit = [0] * 3
    x = X
    for i in range(2):
      unit[i] = min(9, x)
      x -= unit[i]
    for i in range(H): res[i][0] = unit[i % 3]
#for i in range(H): print(*res[i])
def check():
  for i in range(H):
    for j in range(W):
      t = 0
      for u in range(max(0, i - 1), min(H, i + 2)):
        for v in range(max(0, j - 1), min(W, j + 2)): t += res[u][v]
      if t != X: return False
  return True
if check() == False:
  res = [[0] * W for _ in range(H)]
  for i in range(H):
    for j in range(W):
      if i % 3 == 1 and j % 3 == 1: res[i][j] = min(9, X)
if check() == False:
  print(-1)
  exit(0)
for i in range(H):
  print("".join(list(map(str, res[i]))))