UVA 11777

#include<iostream>
#include<cmath>
#include<bits/stdc++.h>

using namespace std;

int main()
{
 double t1,t2,f,aa,c1,c3,c2,c,cz;
 int n;
 double sum;
 while(cin>>n)
 {
  sum=0;
  cz=1;
  while(n--)
  {
   cin>>t1>>t2>>f>>aa>>c1>>c2>>c3;
   double a[3]={c1,c2,c3};
   sort(a,a+3);
   
   c= a[1]+ a[2];
   c = c /2;
   sum = t1+t2+f+aa+c;
   
   if(sum>=90) cout<<"Case "<<cz<<": A"<<endl;
   else if(sum>=80 && sum<90) cout<<"Case "<<cz<<": B"<<endl;
   else if(sum<80 && sum>=70) cout<<"Case "<<cz<<": C"<<endl;
   else if(sum>=60 && sum<70) cout<<"Case "<<cz<<": D"<<endl;
   else if(sum<60) cout<<"Case "<<cz<<": F"<<endl;
   cz++;
  }
  
 }
 return 0;
}