#include <iostream>
#include <string>
#include <set>
 
int count(std::string input)
{
	static const std::set<char> delimeters{' ', '.', ',', ':', '-'};
	static const std::set<char>::iterator _end = delimeters.end();
 
	int word_count{};
	int state{};
	for (std::string::iterator it=input.begin(); it!=input.end(); ++it)
		if (delimeters.find(*it) == _end) state++;
		else
		{
			word_count+= state > 0 ? (state+1)%2 : 0;
			state = 0;
		}
 
	word_count+= state > 0 ? (state+1)%2 : 0;
 
	return word_count;
}
 
 
int main() {
	// your code goes here
 
	std::cout << count("- one, two,three . four :five");
 
	return 0;
}

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