anagram - done
beer - done
anagram - few changes thanks to @etrepum

* export function explicitly
* explictly store the sorted & lowered result.
word-count - strictness issue

thanks to @soapie and @etrepum
anagram - fix impl
wordcount - explicit export
rna-transcription - refinement
bob - refinement
nucleotide-count - working
DNA - first version
point mutations - first version
fetch phone-number
nucleotide-count - version 2

better to have `show c` to handle char pretty printing
remove unnecessary import
point-mutation - version 2

`==`, `not` => `/=`, `id`
phone number - first version
grade-school - first version
phone-number - 2nd version
robot-name - first version
fetch new exercise: leap