import bisect
import copy
import decimal
import fractions
import heapq
import itertools
import math
import random
import sys
import time
from collections import Counter,deque,defaultdict
from functools import lru_cache,reduce
from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max
def _heappush_max(heap,item):
    heap.append(item)
    heapq._siftdown_max(heap, 0, len(heap)-1)
def _heappushpop_max(heap, item):
    if heap and item < heap[0]:
        item, heap[0] = heap[0], item
        heapq._siftup_max(heap, 0)
    return item
from math import gcd as GCD
read=sys.stdin.read
readline=sys.stdin.readline
readlines=sys.stdin.readlines
write=sys.stdout.write

W,H,X=map(int,readline().split())
lst=[[1]*3 for i in range(3)]
for h in range(3):
    for w in range(3):
        if h==2 or w==2 or h==H%3 or w==W%3:
            lst[h][w]=0
for h in range(3):
    for w in range(3):
        if lst[h][w]:
            lst[h][w]=min(X,9)
            X-=lst[h][w]
if X:
    print(-1)
    exit()
ans_lst=[[lst[h%3][w%3] for w in range(W)] for h in range(H)]
for h in range(H):
    print(*ans_lst[h],sep="")