B'You are given a matrix a consisting of positive integers. It has n rows and m columns. Construct a matrix b consisting of positive integers. It should have the same size as a , and the following conditions should be met: We can show that the answer always exists. The first line contains two integers n and m ( 2 <= n,m <= 500 ). Each of the following n lines contains m integers. The j -th integer in the i -th line is a_{i,j} ( 1 <= a_{i,j} <= 16 ). The output should contain n lines each containing m integers. The j -th integer in the i -th line should be b_{i,j} . In the first example, the matrix a can be used as the matrix b , because the absolute value of the difference between numbers in any adjacent pair of cells is 1 = 1^4 . In the third example: '...