def f(mat):
    l = len(mat) // 2
    for line in mat:
        for x in range(l):
            line[x], line[x + l] = line[x + l], line[x]
'''Вводишь n, потом матрицу'''
A = [[int(x) for x in input().split()] for _ in range(int(input())*2)]
f(A)
for x in A:
    print()
    for y in x:
        print(y, end = ' ')