# haru: pypy
import sys
input = sys.stdin.readline
II = lambda : int(input())
MI = lambda : map(int, input().split())
LI = lambda : [int(a) for a in input().split()]
SI = lambda : input().rstrip()
LLI = lambda n : [[int(a) for a in input().split()] for _ in range(n)]
LSI = lambda n : [input().rstrip() for _ in range(n)]
MI_1 = lambda : map(lambda x:int(x)-1, input().split())
LI_1 = lambda : [int(a)-1 for a in input().split()]

mod = 998244353
inf = 1001001001001001001
ordalp = lambda s : ord(s)-65 if s.isupper() else ord(s)-97
ordallalp = lambda s : ord(s)-39 if s.isupper() else ord(s)-97
yes = lambda : print("Yes")
no = lambda : print("No")
yn = lambda flag : print("Yes" if flag else "No")

prinf = lambda ans : print(ans if ans < 1000001001001001001 else -1)
alplow = "abcdefghijklmnopqrstuvwxyz"
alpup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alpall = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
URDL = {'U':(-1,0), 'R':(0,1), 'D':(1,0), 'L':(0,-1)}
DIR_4 = [[-1,0],[0,1],[1,0],[0,-1]]
DIR_8 = [[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1],[-1,-1]]
DIR_BISHOP = [[-1,1],[1,1],[1,-1],[-1,-1]]
prime60 = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59]
sys.set_int_max_str_digits(0)
# sys.setrecursionlimit(10**6)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')

from collections import defaultdict,deque
from heapq import heappop,heappush
from bisect import bisect_left,bisect_right
DD = defaultdict
BSL = bisect_left
BSR = bisect_right


def solve(h, w, m):
    if m == 0:
        return None
    
    a = [[0] * w for i in range(h)]
    
    # # この順序で挿入
    # p = []
    # for i in range(m):
    #     p.append(0)
    #     p.append(h * w - 1 - i)
    # for i in range(m, h * w - m):
    #     p.append(i)
    # p = [x+1 for x in p]
    
    if min(h, w) == 1:
        # ok
        p = []
        for i in range(m - 1):
            p.append(0)
            p.append(h * w - 1 - i)
        for i in range(m - 1, h * w - (m - 1)):
            p.append(i)
        p = [x+1 for x in p]
        # ok
        if h == 1:
            for j in range(w):
                a[0][j] = p[j]
        elif w == 1:
            for i in range(h):
                a[i][0] = p[i]
                
        return a
    
    if h * w % 2 == 0:
        p = []
        for i in range(m):
            p.append(i)
            p.append(h * w - 1 - i)
        for i in reversed(range(m, h * w - m)):
            p.append(i)
        p = [x+1 for x in p]
        
        # print(p)
        
        # hamil
        if h % 2 == 0:
            for i in range(h):
                a[i][0] = p.pop()
            for i in reversed(range(h)):
                if i % 2 == 1:
                    for j in range(1, w):
                        a[i][j] = p.pop()
                else:
                    for j in reversed(range(1, w)):
                        a[i][j] = p.pop()
        else:
            for j in range(w):
                a[0][j] = p.pop()
            for j in reversed(range(w)):
                if j % 2 == 1:
                    for i in range(1, h):
                        a[i][j] = p.pop()
                else:
                    for i in reversed(range(1, h)):
                        a[i][j] = p.pop() 
        
        return a
    
    
    # h * w : odd
    
    if 2 * m == h * w - 1:
        # onegai
        return None

    p = []
    for i in range(m):
        p.append(i)
        p.append(h * w - 1 - i)
    for i in reversed(range(m, h * w - m)):
        p.append(i)
    p = [x+1 for x in p]
    
    p = p[::-1]
    
    # print(p)
    
    a[0][0] = p.pop()
    a[0][1] = p.pop()
    
    for j in range(2, w):
        if j % 2 == 0:
            a[0][j] = p.pop()
            a[1][j] = p.pop()
        else:
            a[1][j] = p.pop()
            a[0][j] = p.pop()
        
    for i in range(2, h):
        if i % 2 == 0:
            for j in reversed(range(1, w)):
                a[i][j] = p.pop()
        else:
            for j in range(1, w):
                a[i][j] = p.pop()
    
    for i in reversed(range(1, h)):
        a[i][0] = p.pop()
    a[1][1] = p.pop()
    a[1][0], a[1][1] = a[1][1], a[1][0]
        
    return a

h, w, m = MI()
a = solve(h, w, m)

if a == None:
    print(-1)
else:
    for i in range(h):
        print(*a[i])