N,M,K = map(int,input().split())
A = [[-1 for j in range(K)] for i in range(K)]
c = 0
for i in range(K):
  for j in range(K):
    A[i][j] = c%M+1
    c += 1
ans = [[A[i%K][j%K] for j in range(N)] for i in range(N)]

for i in ans:
  print(*i)