
'''
t=['aa','b','cc','d','ee']       #4.10    已完成
print('前三个元素：')
print(t[:3])
print(t[1:4])
print(t[2:])'''



t=['qq','ww','ee','rr']        #4.11  #4.12     已完成
p=t[:]
t.append('tt')
p.append('yy')
for q in t:
    print(q)
for o in p:
    print(o)


'''
a=('qq','ee','rr','tt','yy')     #4.13      已完成
for p in a:
    print(p)

a=('qq','ee','rr','pp','ii')
for p in a:
    print(p)'''
