组合数据类型练习，综合练习

s = 'this is a boy'
print(s)
for i in s:
    print(i)
a = list('123455')
print(a)
for i in a:
    print(i)
ss = set('12333')
print(ss)
for i in ss:
    print(i)
d=names = ['Michael', 'Bob', 'Tracy']
dd=scores = [95, 75, 85]
d1 = dict(zip(names, scores))
print(d1)
for i in d1:
    print(i)
tup1 = ('physics', 'chemistry', 1997, 2000)
print(tup1)
for i in tup1:
    print(i)