> #include<iostream>
> using namespace std;
> 
> int main()
> {
>     long a[4];
>     int n;
>     long  d;
>     cin>>n;
>     for(int i =1; i<=n; i++)
>     {
>      cin>>a[0]>>a[1]>>a[2]>>a[3];
>      if((a[1]-a[0]==a[2]-a[1])&&(a[3]-a[2]==a[2]-a[1])) 
>       cout<<a[0]<<" "<<a[1]<<" "<<a[2]<<" "<<a[3]<<" "<<a[3]+a[2]-a[1]<<endl;
>      else
>      
>        cout<<a[0]<<" "<<a[1]<<" "<<a[2]<<" "<<a[3]<<" "<<a[3]*a[1]/a[0]<<endl;
>      }
>       
>     
> }