import numpy as np

n, m, p = map(int,input().split())
l = []
for _ in range(n):
    l.append(list(map(int, input().split())))
n_arr = np.array(l)
l = []
for _ in range(m):
    l.append(list(map(int, input().split())))
m_arr = np.array(l)
print(np.concatenate((n_arr, m_arr), axis = 0))