#include <iostream>
using namespace std;
int main()
{
int t, m, n;
cin>>t;
if (t <= 10){
for (int i = 1; i <= t; i++)
{
cout<<endl;
cin>>m>>n;
if (m <= n)
{
for (int j = m; j <= n; j++)
{
if (j%2==0)
{
cout<<j<<" ";
}
}
}else{
cout<<"Angka ke 1 tidak boleh lebih kecil sama dengan angka ke 2";
}
}
}
else{
cout<<"Batas test case tidak boleh lebih dari 10";
}
return 0;
}
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