Maestro n° 087 : Page 73 - Gr 70
L5C1 =2=5= L5C1 -5- L5C5 =5= L7C5 -5-6- L7C5 =6= L7C9 -6- L6C9 =6= L6C8 -6-5- L6C8 =5= L5C8 donc L5C8 ≠ 2 et L5C1 ≠ 5