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(11, 5) :

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	11		5	1	0	0	1
1	11		5	1	0	0	1	6	0	1	1	1	1	3	6	12	3	6
2	3		5	3	6	0	1	2	1	3	7	3	7	1	8	18	4	9
3	1	↔	3	4	9	3	6	2	1	7	15	2	4	1	Even	Even	1	2
4	1		1	1	2	4	9	0
5	1		1	1	2	4	9	0
6	1		1	1	2	4	9	0
7	1		1	1	2	4	9	0
(1)(11) - (2)(5) = 1