problem 1613A

///BIJON SAHA DURJOY
// SUST_SWE19
#include<bits/stdc++.h>
using namespace std;
int main()
{
     long long int t;
     cin>>t;
     while(t--)
     {
          long long int x1, p1, x2, p2;
          cin>>x1>>p1>>x2>>p2;
          vector<int>v1;
          vector<int>v2;
          v1.push_back(x1);
          while(p1--)
          {
               v1.push_back(0);
          }
          v2.push_back(x2);
          while(p2--)
          {
               v2.push_back(0);
          }

          if(v1>v2)
          {
               cout<<">"<<endl;
          }
          else if(v1<v2)
          {
               cout<<"<"<<endl;
          }
          else
          {
               cout<<"="<<endl;
          }

     }
     return 0;
}
//problem 1613 A