Количество слов в тексте

a = int(input())
c = ' '.join(''.join(x for x in input() if x.isalpha() or x.isspace()) for i in range(a))
print(len(set(c.split())),sep='',end='')

a = '''She sells sea shells on the sea shore;
The shells that she sells are sea shells I'm sure.
So if she sells sea shells on the sea shore,
I'm sure that the shells are sea shore shells.'''
 
print(len({x for x in re.findall(r'\w+', a)}))

print(len({x for x in re.findall(r'[A-z\']+', a)}))

words = set()
for _ in range(int(input())):
    words.update(input().split())
print(len(words))

a = int(input())
c = ' '.join(''.join(x for x in input()) for i in range(a))
print(len(set(c.split())),sep='',end='')

text='''She sells sea shells on the sea shore;
The shells that she sells are sea shells I'm sure.
So if she sells sea shells on the sea shore,
I'm sure that the shells are sea shore shells.'''
len(set(text.split())&set(text.split()))

len(set(text.split()))

a = int(input())
b = int(input())
c = int(input())
print(a // 2 + b // 2 + c // 2 + a % 2 + b % 2 + c % 2)

len(set(text.split()))

a=2
c=[]
for i in range(a):
    for x in input():
        if x.isalpha() or x.isspace():
            c.append(x)
 
print(''.join(c), sep=' ')

import sys
 
for line in sys.stdin:
    print(len(set(str(sys.stdin.read()).split())))

import sys
 
print(len(set(sys.stdin.read().split())))