#include <iostream>
#include <string>
#include <vector>

template <class Container>
void split(const std::string& str, Container& cont,
	const std::string& delims = " ")
{
	std::size_t current, previous = 0;
	current = str.find_first_of(delims);
	while (current != std::string::npos) {
		cont.push_back(str.substr(previous, current - previous));
		previous = current + 1;
		current = str.find_first_of(delims, previous);
	}
	cont.push_back(str.substr(previous, current - previous));
}

int main()
{
	std::string s;
	std::getline(std::cin, s);
	std::vector<std::string> words;
	split(s, words, "10x ");
	int min = stoi(words[0]);
	for (int i = 1; i < words.size(); i++)
	{
		int x;
		x = stoi(words[i]);
		min = x < min ? x : min;
	}
	std::cout << min;
    return 0;
}