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#include<iostream>
#include<string>
using namespace std;
int main()
{
	string s;
	getline(cin,s);
	int len = s.length();
	s[len-1] = ' ';
	int max=0, start=0, end=0;
	int temp=0;
	for (int i = 0; i <=len; i++)
	{
		if (s[i] !=' ')
		{
			temp++;
		}
		else
		{
			if (max <= temp)
			{
				max = temp;
				end = i-1 ;
				start = i - temp;
			}
			temp = 0;
		}
	}
	for (int i = start; i <= end; i++)
	{
		cout << s[i];
	}
	return 0;
}