class skill:
    pass
class skilliterator:
    def __init__(self,skills):
        self.skills=skills
        self.index=0
    def __next__(self):
        if self.index==len(self.skills):
            raise StopIteration
        temp=self.skills[self.index]
        self.index+=1
        return temp
class skillmanager:
    def __init__(self):
        self.skills=[]
    def addskill(self,skill):
        self.skills.append(skill)
    def __iter__(self):
        return skilliterator(self.skills)

p=skillmanager();
p.addskill(skill());
p.addskill(skill());
for i in p:
    print(i)