W,H,X=map(int,input().split())
L=[[0 for i in range(W)] for j in range(H)]
L=[[-1 for i in range(W)] for j in range(H)]
for i in range(H):
  if i%3==2:
    L[i]=["0"]*W
for i in range(H):
  for j in range(W):
    if j%3==2:
      L[i][j]="0"
if H%3==1:
  for i in range(H):
    if i%3==1:
      L[i]=["0"]*W
if H%3==0:
  for i in range(H):
    if i%3==0:
      L[i]=["0"]*W
if W%3==1:
  for i in range(H):
    for j in range(W):
      if j%3==1:
        L[i][j]="0"
if W%3==0:
  for i in range(H):
    for j in range(W):
      if j%3==0:
        L[i][j]="0"
R=[[-1 for i in range(3)] for j in range(3)]
for i in range(3):
  for j in range(3):
    if i>=H or j>=W:
      continue
    R[i][j]=L[i][j]
    if L[i][j]!="0":
      if X<=9:
        R[i][j]=X
        X=0
      else:
        R[i][j]=9
        X-=9
if X!=0:
  print(-1)
  exit()
for i in range(H):
  for j in range(W):
    L[i][j]=str(R[i%3][j%3])
  print("".join(L[i]))