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(14, 8) → Twos = 1 → Ext-GCD(7, 4) :

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	7		4	1	0	0	1
1	4	↔	7	0	1	1	0	3						2	4	8	2	4
2	2	↔	7	2	4	1	0	5						1	Even	Even	1	2
3	1	↔	7	1	2	1	0	6	1	2	2	2	2	3	Even	Even	1	1
4	3		1	1	1	1	2	2	0	2	3	2	3	1	6	10	3	5
5	1		1	3	5	1	2	0
6	1		1	3	5	1	2	0
7	1		1	3	5	1	2	0
(3)(14) - (5)(8) = 2