XiangRunYe likes programming, once won the gold medal in the competition that ZUFE held in 2014.Xiang also like square, he wants you to help him to print it, hope you can help him.
输入格式
Multiple sets of test data, input an integer N in each group of test data.
输出格式
For each set of test data, output a N*N hollow square which were made up of “8”.