In this task, you are given a sentence in Polish language and its corresponding English translation. Here, your job is to output label "yes" if the translation is correct, otherwise output "no".

Ex Input:
Polish: Niestety, wszystko zapełnia się szybko,  
 English: Unfortunately, things are filling up fast, 

Ex Output:
yes


Ex Input:
Polish: Mieszkaniec ziemi - osobnik zamieszkujący ziemię 
 English: what these matrices are.

Ex Output:
no


Ex Input:
Polish: Zdefiniujmy kilka zbiorów.  
 English: Let's define some sets. 

Ex Output:

yes