# last_two





Given a string of any length, return a new string where the last 2 chars, if present, are swapped, so "coding" yields "codign".

This exercise was taken from [codingbat.com](https://codingbat.com/prob/p194786) and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.






### Test 1
**Input:**
```
'coding'
```
**Output:**
```
'codign'
```
### Test 2
**Input:**
```
'cat'
```
**Output:**
```
'cta'
```
### Test 3
**Input:**
```
'ab'
```
**Output:**
```
'ba'
```
### Test 4
**Input:**
```
'a'
```
**Output:**
```
'a'
```
### Test 5
**Input:**
```
''
```
**Output:**
```
''
```