n=int(input())
m=int(input())
num=int(input())
nan=[0]*n
nv=[0]*m
head1,tail1=0,0
head2,tail2=0,0
for i in range(1,n+1):
    nan[tail1]=i
    tail1+=1
for j in range(1,m+1):
    nv[tail2]=j
    tail2+=1
for k in range(num):
    print(nan[head1],nv[head2])
    head1=(head1+1)%n
    head2=(head2+1)%m