#include <iostream>

void Nword(char* initialString, int position)
{
	if (position == 0)
	{
		std::cout << -1;
		return;
	}
	else if (position == 1)
	{
		while (*initialString != ' ')
		{
			//initialString = initialString + 1;
			std::cout << *initialString;
			if (*initialString != '\0')
				initialString = initialString + 1;
			else return;
		}
		return;
	}
	else
	{
		if (*initialString == ' ')
			return Nword(initialString + 1, position - 1);
		else
		{
			return Nword(initialString + 1, position);
		}
	}
}
int main()
{
	char a[] = "asadf fadf sdfs gfusdhh";
	int b;
	std::cin >> b;
	Nword(a, b);
	return 0;

}