import sys lines=sys.stdin.read().splitlines() if not lines: sys.exit(0) r,c=map(int,lines[0].split()) A=[] B=[] idx=1 for _ in range(r): A.append(list(map(int,(lines[idx] if idx<len(lines) else '').split()[:c]))); idx+=1 for _ in range(r): B.append(list(map(int,(lines[idx] if idx<len(lines) else '').split()[:c]))); idx+=1 class Matrix: def __init__(self,mat): self.mat=mat def add(self,other): res=[] for i in range(len(self.mat)): row=[] for j in range(len(self.mat[0])): row.append(self.mat[i][j]+other.mat[i][j]) res.append(row) return Matrix(res) M=Matrix(A).add(Matrix(B)).mat out=[] for row in M: out.append(' '.join(map(str,row))) print('\ '.join(out))