#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main()
{
	setlocale(LC_ALL, "Russian");

	string previous = "The cat cat jumped ";
	string current;
	while (getline(cin, current)) {
		if (previous == current) {
			cout << "повторяющееся слово: " << current << "\n";
		}
		previous = current;
	}

	return 0;
}