#include <iostream>
using namespace std;
int main()
{
int l1,l2,ile42=0;
while(cin>>l1)
{
if(l1==42)
{
ile42++;
if(ile42==3)
{
break;
}
else
{
l2=l1;
}
}
else
{
ile42=0;
}
cout<<l1<<endl;
}
return 0;
}
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