local w, h, x = io.read("*n", "*n", "*n")
if x == 0 then
  for i = 1, h do
    print(string.rep("0", w))
  end
  os.exit()
end
if w == 1 then
  if h == 1 then
    if 9 < x then
      print(-1)
    else
      print(x)
    end
  elseif h % 3 ~= 2 or 18 < x then
    print(-1)
  else
    local t = {}
    t[1] = math.min(x, 9)
    t[2] = x - t[1]
    for i = 1, h do
      if i % 3 == 1 then
        print(t[1])
      elseif i % 3 == 2 then
        print(t[2])
      else
        print(0)
      end
    end
  end
  os.exit()
end
if h == 1 then
  if w % 3 ~= 2 or 18 < x then
    print(-1)
  else
    local t = {}
    t[1] = math.min(x, 9)
    t[2] = x - t[1]
    for j = 1, w do
      if j % 3 == 1 then
        io.write(t[1])
      elseif j % 3 == 2 then
        io.write(t[2])
      else
        io.write(0)
      end
    end
    io.write("\n")
  end
  os.exit()
end
if w % 3 ~= 2 or h % 3 ~= 2 or 36 < x then
  print(-1)
  os.exit()
end
do
  local t = {}
  for i = 1, 4 do
    t[i] = math.min(x, 9)
    x = x - t[i]
  end
  for i = 1, h do
    for j = 1, w do
      if i % 3 == 1 and j % 3 == 1 then
        io.write(t[1])
      elseif i % 3 == 1 and j % 3 == 2 then
        io.write(t[2])
      elseif i % 3 == 2 and j % 3 == 1 then
        io.write(t[3])
      elseif i % 3 == 2 and j % 3 == 2 then
        io.write(t[4])
      else
        io.write(0)
      end
    end
    io.write("\n")
  end
end