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, 12) → Twos = 1 → Ext-GCD(7, 6) :

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		6	1	0	0	1
1	6	↔	7	0	1	1	0	1						3	6	8	3	4
2	3	↔	7	3	4	1	0	4	1	4	4	4	4	2	Even	Even	2	2
3	2		3	2	2	3	4	1						1	Even	Even	1	1
4	1		3	1	1	3	4	2	1	4	5	4	5	1	10	12	5	6
5	1	↔	1	5	6	1	1	0
6	1	↔	1	5	6	1	1	0
7	1		1	1	1	5	6	0
(1)(14) - (1)(12) = 2