Do not perform ⒸⓇⒶⓏⓎ `to_sym` convertion on every input char
ⒸⓄⓃⓋⒺⓇⓉ actually returns converted string

Also, extracted ⒸⓄⓅⓎ into a separate method
Merge pull request #3 from rwz/master

ⓦ⓪⓪ⓣ