N,M = map(int,input().split())
aa = []
bb = []
cc = []
for i in range (N):
a = list(map(int, input().split()))
aa.append(a)
for i in range (N):
b = list(map(int, input().split()))
bb.append(b)
for i in range (N):
row = []
for j in range (M):
row.append(aa[i][j] + bb[i][j])
cc.append(row)
for row in cc:
print(' '.join(map(str, row)))