02.07Center Alignment居中对齐

Center Alignment | JXNUOJ

描述：

Almost every text editor has a built-in function of center text alignment. The developers of the popular in Berland text editor «Textpad» decided to introduce this functionality into the fourth release of the product.

You are to implement the alignment in the shortest possible time. Good luck!

几乎每一个文本编译器都有居中对齐功能。流行的Berland文本编译器《Textpad》决定将此功能放入新发行的第四版本。

你将在尽可能短的时间里完成对齐。祝你好运。

输入：

The input file consists of one or more lines, each of the lines contains Latin letters, digits and/or spaces. The lines cannot start or end with a space. It is guaranteed that at least one of the lines has positive length. The length of each line and the total amount of the lines do not exceed 1000.

输入文本包含一行或者更多行。每一行包含字母，数字和/或者空格。每一行不能由空格开始或者结束。保证至少一行有正数长度。每一行的长度和总行数都不超过1000。

输出：

Format the given text, aligning it center. Frame the whole text with characters «*» of the minimum size. If a line cannot be aligned perfectly (for example, the line has even length, while the width of the block is uneven), you should place such lines rounding down the distance to the left or to the right edge and bringing them closer left or right alternatively (you should start with bringing left). Study the sample tests carefully to understand the output format better.

设定给定文本格式，将其居中。用最小字符《*》框住他。如果一行不能完全对齐（例如，某行有偶数长度，但是块的宽度是不均匀的），你就需要这样放置行，将距离上下舍入到左边或者右边，并使他们更接近左边或者右边。（你应该从左边开始）。仔细研究测试样例，以更好了解输出格式。

样例输入：

This  isCodeforces
Beta
Round
5

样例输出：

************
* This  is *
*          *
*Codeforces*
*   Beta   *
*  Round   *
*     5    *
************

样例输入：

welcome to the
Codeforces
Beta
Round 5and
good luck

样例输出：

****************
*welcome to the*
*  Codeforces  *
*     Beta     *
*   Round 5    *
*              *
*      and     *
*  good luck   *
****************