n,m =map(int,input().split())
a = list(map(int, input().split()))
for i in range(n):
list_start=i*m
list_end=list_start+m
print(*a[list_start:list_end])
n, m = map(int, input().split())
a = list(input().split())
# count = 0
for i in range(n):
for j in range(m):
# print(a[count], end=' ')
# count += 1
print(a[i*m+j], end=' ')
print()