sid	grade
8471	C
9769	F
0000	B
0429	B
1234	C
1346	A
1575	A
1620	A
1811	B
2223	B
2333	B
2407	B
2424	C
2489	B
2544	B
2912	B
3018	C
3052	B
3140	B
3427	D
3751	C
3898	A
4202	C
4240	B
4426	B
5129	B
5303	D
5555	A
5555	C
6199	C
6205	C
6440	B
6667	B
6895	A
7080	B
7241	C
7317	C
7485	C
7660	C
7735	C
7777	B
7852	B
8051	D
9233	C
9244	C
9502	B
9589	C
9738	C
9772	B
abcd	A
auaj	C
avaj	B
bdkc	A
bgrw	A
brad	A
chan	B
cind	A
dawg	A
dcba	C
ded	C
dg8k	B
eeks	B
fevc	B
fief	A
frop	A
fusn	B
gass	C
hipo	D
htrd	A
jjds	B
katz	A
kiwi	B
klee	B
kreg	C
noah	C
ping	C
teic	D
tf97	D
tnt2	B
todd	B
tony	C
toor	B
tree	C
visi	C
wxyz	D
y33	B
ydku	A
zerg	B
zzzz	B
	C
	F