from urllib import urlopen,urlencode
 
class Dummy():
    def __init__(self,dummy):
        self.dummy = dummy
 
    def relevant_content(self):
        return self.dummy
 
    def __str__(self):
        return "dummy: %s"%(self.dummy)
 
    __repr__ = __str__
 
def extractKeyWords(contextable):
    dic_params ={
        "appid" : "teventomeeter",
        "context" : contextable.relevant_content(),
        "output" : 'json', 
    }
    params = urlencode(dic_params)
    urlbase = "http://search.yahooapis.com/ContentAnalysisService/V1/termExtraction?%s"%(params)
    results = urlopen(urlbase)
    jsonResults = results.read()
    dic = eval(jsonResults)
    return dic['ResultSet']['Result']
   
 
if __name__ == '__main__':
    dummy = Dummy(raw_input("Enter Text\n"))
    print extractKeyWords(dummy)