Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.

Input: Consider Input: Question: I'm a non-native English speaker, and my automatic spellchecker seems to accept both therefore and therefor. Is one orthography preferred ? Is that a British vs. American difference ? Or an old vs. more recent orthography ? Or something else ? 
Answer: Therefor means for that. For example: Here we sell guitars and accessories therefor. Therefor is one of a whole series of adverbs: thereof (of that), thereafter(after that), therein (in there), etc. If you are familiar with German - the Germanic sister of English - you can find a direct analogy there: for = fur therefor, for that = dafur (literally, therefor) Therefore, as you must know, means as a (logical) consequence.

Output: yes


Input: Consider Input: Question: Is there a single word that means "Being merry at Christmas" but excludes being merry or happy at New Year? 
Answer: christmasyaynewyearsnay: Christmas Yay New Years Nay I think this sums it up in a very matter-of-fact way and is also how I feel regarding the matter =D.

Output: no


Input: Consider Input: Question: What's the difference in meaning between "register" and "registry"? Can both be used interchangeably when talking about an official (public) list of items, records? 
Answer: The online oxford dict says: Register noun official list or record, for example of births, marriages, and deaths, of shipping, or of historic places. a book or record of attendance, for example of students in a class or school or guests in a hotel. Registry: noun (plural registries) a place or office where registers or records are kept. But yeah, it also says that a registry too can mean a list. And I think 'Registry' is used more in the former context than the later. Even while talking in context of computers we say things like 'Windows Registry'. For me, the word register brings along a sense of being finite but registry does not. like when I think of a register of records, I usually get a quantified picture of the records list comes to my mind, like a page, or a notebook. but 'registry' brings along a picture of non quantifiable !! or its just weird with me. Anyone have other thoughts on this?.


Output: yes