英文单词求复数问题

编写一个程序，可以将英语规则名词（不考虑不满足以下规则的英语单词）由单数变成复数。已知规则如下：

a)以辅音字母y结尾，则将y改成i，再加es；

b)以s，x，ch，sh结尾，则加es；

c)以元音o结尾，则加es；　　

d)其他情况直接加s。

要求用键盘输入英语规则名词，屏幕输出该名词的复数形式。

样例输入：

box

样例输出：

Boxes

-English words in complex problems

      Write a program, the rules of English nouns English words) (without regard to the following rules are not met by the singular into plural. Known rules are as follows:

      a) to the end of the consonants y, then y changed to i, plus es

      b) s, x, ch, sh End, then add es

      c) end with a vowel o add es

      d) other circumstances directly add s.

      Requirements of the rules of English nouns, keyboard input and screen output of the plural form of the noun.

      Sample input:

      box

      Sample Output:

      Boxes