Maestro n° 099 : Page 81 - Gr 78
L2C6 =7=1= L2C6 -1- L2C4 =1=9= L2C4 -9- L2C7 =9= L7C7 -9- L7C5 =9= L9C5 -9-6- L9C5 =6= L9C4 -6- L1C4 =6= L1C6 -6-4- L1C6 =4= L1C2 -4- L3C3 =4=7= L3C3 donc L2C1 et L3C56 ≠ 7