1 #include <iostream>
 2 #include <algorithm>
 3 #include <cstring>
 4 #include <cstdio>
 5 #include <cmath>
 6 #include <stack>
 7 #include <set>
 8 #include <map>
 9 #include <queue>
10 #include <climits>
11 
12 using namespace std;
13 int N, temp;
14 
15 int main()
16 {
17     cin >> N;
18     while (N --)
19     {
20         cin >> temp;
21         if (temp >= 90 && temp <= 100) cout <<"A" <<endl;
22         else if (temp >= 80 && temp <= 89) cout <<"B" <<endl;
23         else if (temp >= 70 && temp <= 79) cout <<"C" <<endl;
24         else if (temp >= 60 && temp <= 69) cout <<"D" <<endl;
25         else
26             cout <<"E" <<endl;
27     }
28 }