BlueBook

Given ~T~ ~(1 \le T \le 100)~ integers in the range ~(-1\,000, 1\,000)~, representing percentages, calculate which letter grade each of them corresponds to.

The mark table is as follows:

Input Specification

Line ~1~: One integer ~T~
Lines ~2 \dots T+1~: One integer ~N~

Output Specification

Lines ~1 \dots T~: One character denoting the letter grade received.

Sample Input

3
10
99
101

Sample Output

F
A
X