p02546 AtCoder Beginner Contest 179 - Plural Form
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.

Examples

Input

apple


Output

apples


Input

bus


Output

buses


Input

box


Output

boxs
```python
n=input()
if( n[-1]=='s'):
    n+='es'
else:
    n+='s'
print(n)
```