Maestro n° 099 : Page 78 - Gr 75
L7C9 =4=9= L7C9 -9- L7C2 =9= L8C2 -9-2- L8C2 =2= L8C3 -2-1- L8C3 =1= L2C3 -1-4- L2C3 =4= L9C3 donc L7C2 et L9C789 ≠ 4