a = input()
print(int(a.count(' ')) + 1 )

 import sys
import re
# You need to check regexp for your needs...
wc = lambda s:  set(re.findall(r"""[\w'";,\.)]+""", s))
print('Words, total: ', set.union(*(wc(line) for line in sys.stdin.readlines())).__len__())

  
>>> s = """
... 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.
... """
>>> 
>>> n = len(set(s.split()))
>>> n
19
>>>

 len(set(re.findall('[^ \n]+', sys.stdin.read())))