#include <iostream>
#include <vector>
using namespace std;
 
int main()
{
    vector <int> tablica;
    int liczba;
    short ile_razy = 0;
    while(cin>>liczba)
    {
    	if(ile_razy<=3)
    	{
        tablica.push_back(liczba);
    	}
        if((tablica[tablica.size()-1] == 42) && (tablica[tablica.size()-2] != 42))
        {
        	ile_razy++;
        }
    }
    for(int i=0; i<tablica.size(); i++)
    {
        cout << tablica[i] << endl;
    }
}
 

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NDIKNDIKMTIKMTMKNDIKMTEKNDIKNDMKNDIKNDIKOTkKMDE=

42
42
12
13
42
11
42
43
42
42
99
01