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matplotlib不支持中文

a=input() a=list(a) letter='qwertyuiopasdfghjklzxcvbnm' b=[] for i in a: if len(b)>=10: break if i.lower() in letter and i.upper() not in b and i.lower() not in b: b.append(i) if len(b)<10: print ('not found',end='') else: