h,w,k=map(int,input().split())
import random
X=[]
for i in range(h):
    I=list(range(i*w+1,i*w+w+1))
    X.append(I)

V4=[(1,0),(-1,0),(0,1),(0,-1)]
V5=[(1,0),(-1,0),(0,1),(0,-1),(0,0)]
def cha(x,y):
    fg=True
    for V in V4:
        if 0<=x+V[0]<h and 0<=y+V[1]<w:
            if X[x+V[0]][y+V[1]]<X[x][y]:
                fg=False
    return fg
def chb(x,y):
    fg=True
    for V in V4:
        if 0<=x+V[0]<h and 0<=y+V[1]<w:
            if X[x+V[0]][y+V[1]]>X[x][y]:
                fg=False
    return fg

a=0
b=0
for i in range(h):
    for j in range(w):
        if cha(i,j):
            a+=1
        if chb(i,j):
            b+=1

while a!=k or b!=k:
    x1,y1=random.randint(0,h-1),random.randint(0,w-1)
    x2,y2=random.randint(0,h-1),random.randint(0,w-1)
    prea,preb=a,b
    for V in V5:
        if 0<=x1+V[0]<h and 0<=y1+V[1]<w:
          if cha(x1+V[0],y1+V[1]):
            a-=1
        if 0<=x1+V[0]<h and 0<=y1+V[1]<w:
          if chb(x1+V[0],y1+V[1]):
            b-=1
        if 0<=x2+V[0]<h and 0<=y2+V[1]<w:
          if cha(x2+V[0],y2+V[1]):
            a-=1
        if 0<=x2+V[0]<h and 0<=y2+V[1]<w:
          if chb(x2+V[0],y2+V[1]):
            b-=1
    X[x1][y1],X[x2][y2]=X[x2][y2],X[x1][y1]
    for V in V5:
        if 0<=x1+V[0]<h and 0<=y1+V[1]<w:
          if cha(x1+V[0],y1+V[1]):
            a+=1
        if 0<=x1+V[0]<h and 0<=y1+V[1]<w:
          if chb(x1+V[0],y1+V[1]):
            b+=1
        if 0<=x2+V[0]<h and 0<=y2+V[1]<w:
          if cha(x2+V[0],y2+V[1]):
            a+=1
        if 0<=x2+V[0]<h and 0<=y2+V[1]<w:
          if chb(x2+V[0],y2+V[1]):
            b+=1
    if abs(prea-k)+abs(preb-k)<abs(a-k)+abs(b-k):
        X[x1][y1],X[x2][y2]=X[x2][y2],X[x1][y1]
        a=prea
        b=preb

for I in X:
    print(*I)