is	S	1
is	S	2
is	S	4
is	S	8
is	S	16
is	A	1
is	A	2
is	A	4
is	A	8
is	A	16
is	A	32
is	A	64
is	A	128
is	B	1
is	B	2
is	B	4
is	B	8
is	B	16
is	B	32
is	B	64
is	B	128
is	C	1
is	C	2
is	C	4
is	C	8
is	C	16
is	C	32
is	C	64
is	C	128