实验5：5-5

def count_num(s):
    d={}
    lst=s.split()
    for c in lst:
        if c not in d:
            d[c]=1
        else:
            d[c]=d[c]+1
    return d

s1='Python VB VFP C C++ Java Python Java Python C'
dd=count_num(s1)
d1=sorted(dd.keys())
print('Order of keys:')
for c in d1:
    print(c,dd[c])

d2=sorted(dd.items(),key=lambda d:d[1])
print('Order of values:')
for c in d2:
    print(c[0],c[1])