X =	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Y =	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
X ↔ Y

Ext-GCD(9, 2) :

i	GCD			Bezout				AOdd :						AEven :
	A	↔	B	ax	ay	bx	by	|A-B|	A↔B	Sx	Sy	ax ← Sx'	ay ← Sy'	A ← A/2	ax ← ax + Y	ay ← ay + X	ax ← ax/2	ay ← ay/2
0	9		2	1	0	0	1
1	2	↔	9	0	1	1	0	7						1	2	10	1	5
2	1	↔	9	1	5	1	0	8	1	2	5	2	5	4	4	14	2	7
3	4		1	2	7	1	5	3						2	4	16	2	8
4	2		1	2	8	1	5	1						1	Even	Even	1	4
5	1		1	1	4	1	5	0
6	1		1	1	4	1	5	0
7	1		1	1	4	1	5	0
(1)(9) - (4)(2) = 1