---

#include<iostream>
using namespace std;
int main()
{
    int a,b;
    double d,f,g,h;
while(cin>>b)
{
for(a=1;a<=b;a++)
{
cin>>d>>f>>g>>h;
}
for(a=1;a<=b;a++)
{
if(d==g&&f==0&&h==0)
cout<<"=";
else if(d>g&&f==0&&h==0)
cout<<">";
else if(d<g&&f==0&&h==0)
cout<<"<";
else if(f!=0||h!=0)
cout<<"No";
cout<<endl;
}
}       
}