## Task
In this kata you'll be given a string of English digits "collapsed" together, like this:
`zeronineoneoneeighttwoseventhreesixfourtwofive`
Your task is to split the string back to digits:
`zero nine one one eight two seven three six four two five`
## Examples
```
three -> three
eightsix -> eight six
fivefourseven -> five four seven
ninethreesixthree -> nine three six three
fivethreefivesixthreenineonesevenoneeight -> five three five six three nine one seven one eight
```
import re

def uncollapse(digits):
    return ' '.join(m.group() for m in re.finditer(r'zero|one|two|three|four|five|six|seven|eight|nine', digits))
import re

def uncollapse(digits):
    return ' '.join(m.group() for m in re.finditer(r'zero|one|two|three|four|five|six|seven|eight|nine', digits))