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Score : $100$ points

### 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.

### Constraints

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

### Input

Input is given from Standard Input in the following format:

$S$


### Output

Print the plural form of the given Taknese word.

### 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