#include<iostream>
#include<string>
using namespace std;

int main()
{
    string currword,preword;
    cout << "Enter some words:" << endl;
    while(cin >> currword)
    {
        #ifndef NDEBUG
        cout << currword << " ";
        #endif
        if(preword == currword)
            break;
        else
            preword = currword;
    }
    cout << "currword: " << currword << endl;
    cout << "preword: " << preword << endl;
    if(currword == preword && !currword.empty())
        cout << "The repeated word is : " << currword << endl;
    else
        cout << "No repeated word!" << endl;
    return 0;
}