R1 4-2-1-6
R2 8-4-1-9 MDN
R3 2-9-1-4 MDN
R4 4-3-6-8
R5 3-7-5-1
R6 3-6-2-5
R7 1E-8-2-3
R8 9-7-4-1
R9 12-10-7-6
GOOD LUCK