综合练习：词频统计

song = ‘‘‘
just colse your eyes，the sun is going down
you‘ll be all right，no one can hurt you now
come morning light ，you and i ’ll be safe and sound
‘‘‘
str1 = song.replace(‘’‘,‘ ‘).lower().split()
str2 = song.split()
c = {}
for i in str2:
    count = str1.count(i)
    c[i] = count

word = ‘‘‘
i ’ll you‘ll the 
‘‘‘
str3 = word.split()
for i in str3:
    if i in c.keys():
        del (c[i])

count = sorted(c.items(),key=lambda items: items[1], reverse=True)

for i in range(10):
    print(count[i])