답안

people = [
         ('이호준', '01050004429'),
         ('이호상', '01051442904'),
         ('이준호', '01050003429'),
         ('이호준', '01050004429'),
         ('이준', '01050412904'),
         ('이호', '0105000443904'),
         ('이호준', '01050004429'),
         ]

print(len(set(people)))