From the readme: $ echo 'cat' | trre 'c:da:ot:g' dog Why? Elsewhere, the readme says that ":" is "non-associative", and I had a look at the language

From the readme: $ echo 'cat' | trre 'c:da:ot:g' dog Why? Elsewhere, the readme says that ":" is "non-associative", and I had a look at the language grammar but haven't figured out how to parse a sequence of ":".