Maestro n° 086 : Page 70 - Gr 67
L2C8 =3=6= L2C8 -6- L3C8 =6= L3C6 -6-4- L3C6 =4= L7C6 -4-9- L7C6 =9= L7C8 -9-3- L7C8 =3= L7C7 donc L2C7 et L7C8 ≠ 3