Problem Statement

In the Kingdom of AtCoder, people use a language called Taknese, which uses lowercase English letters.
In Taknese, the plural form of a noun is spelled based on the following rules:

• If a noun's singular form does not end with s, append s to the end of the singular form.
• If a noun's singular form ends with s, append es to the end of the singular form.

You are given the singular form S of a Taknese noun. Output its plural form.

Input

Input is given from Standard Input in the following format:
S

Output

Print the plural form of the given Taknese word.

Constraints

• S is a string of length 1 between 1000, inclusive.
• S contains only lowercase English letters.

Sample Input 1

apple

Sample Output 1

apples

apple ends with e, so its plural form is apples.

Sample Input 2

bus

Sample Output 2

buses

bus ends with s, so its plural form is buses.

Sample Input 3

box

Sample Output 3

boxs

见题面 Input 部分

见题面 Output 部分