BlueBook

Given $T$ $(1\le T\le 100)$ integers in the range $(-1000,1000)$, 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