1	0	LOAD_NAME	0	(s)
	3	LOAD_NAME	1	(a)
	6	DUP_TOP_TWO
	7	BINARY_SUBSCR			<1>
	8	LOAD_NAME	2	(b)
	11	INPLACE_ADD			<2>
	12	ROT_THREE
	13	STORE_SUBSCR			<3>
	14	LOAD_CONST	0	(None)
	17	RETURN_VALUE