Hello World for U

题目1464：Hello World for U时间限制：1 秒内存限制：128 兆特殊判题：否提交：2085解决：564题目描述：Given any string of N (>=5) characters, you are asked to form the characters into the shape of U. For example, "helloworld" can be printed as:h    de     ll      rlowoThat is, the characters must be printed in the original order, starting top-down from the left vertical line with n1 characters, then left to right along the bottom line with n2 characters, and finally bottom-up along the vertical line with n3 characters. Andmore, we would like U to be as squared as possible -- that is, it must be satisfied that n1 = n3 = max { k| k <= n2 for all 3 <= n2 <= N } with n1 + n2 + n3 - 2 = N.输入：There are multiple test cases.Each case contains one string with no less than 5 and no more than 80 characters in a line. The string contains no white space.输出：For each test case, print the input string in the shape of U as specified in the description.样例输入：

helloworld!
ac.jobdu.com

样例输出：

h   !
e   d
l   l
lowor
a    m
c    o
.    c
jobdu.