How is it possible only using RegExp, to get the portion `ZZ...` of string

> 
> hello example A hello example B hello example C hello example D, ..., heLLo ZZ...
> 
> 
> 

Just after the last occurrence of `hello`; but how without `explode()`, `preg_split()`, etc...?

Only using **one line of RegExp**?

```
$string = 'hello example A hello example B hello example C hello example D, ..., heLLo ZZ...';
preg_match('/(hello).*$/is', $string, $match);print_r($match);
preg_match('/(hello)$.*$/is', $string, $match);print_r($match);
preg_match('/["hello"]{1}.*/is', $string, $match);print_r($match);

```

I can't find out how to get my target: `ZZ...`  

In words: Anything after the last `hello`