Maestro n° 086 : Page 83 - Gr 80
L1C2 =4= L8C2 -4-1- L8C2 =1= L7C2 -1-3- L7C2 =3= L7C9 -3- L5C9 =3=5= L5C9 -5- L5C1 =5=4= L5C1 donc L12C1 ≠ 4