m=int(input())

w=int(input())

song=int(input())

maxx=max(m,w,song)

man=[0]*(maxx+20)

woman=[0]*(maxx+20)

for i in range(1,m+1):

man[i-1]=i

headm=0

tailm=m

for j in range(1,w+1):

woman[j-1]=j

headw=0

tailw=w

k=0

while k<song:

print(man[headm],woman[headw])

man[tailm]=man[headm]

woman[tailw]=woman[headw]

headm+=1

tailm+=1

headw+=1

tailw+=1

k+=1