## Challenge

We get only 62 characters to convert the letters in a string into alternating upper and lower case:

```
"Hello World! Hallo Welt!"
```
becomes
```
"HeLlO wOrLd! HaLlO wElT!"
```

## Solution

Using a similar strategy to perl golf, we had a legit 63 character solution:

```php

Original writeup (https://github.com/teamavidya/ctf/tree/master/2015_hacklu/php_golf%5Bcoding75%5D).