4a

file=open("testsimple.txt","r")
text=file.read().lower()
words=text.split()
freq={}
for w in words:
    if w in  freq:
        freq[w] += 1
    else:
        freq[w] = 1
sorted_words=sorted(freq.items(),key=lambda x:x[1],reverse=True)
print("Top frequent words:")
for i in range(min(10,len(sorted_words))):
    print(sorted_words[i])
