Maestro n° 099 : Page 60 - Gr 57
L3C2 =2= L2C3 -2-7- L2C3 =7= L2C8 -7-6- L2C8 =6= L2C7 -6- L6C7 =6= L6C9 -6-2- L6C9 =2= L6C3 donc L2C3 et L4C2 ≠ 2