R1 8-10-7-5 ls 9 r3 2-4-6-1 r5 6-7-2-8 ls 4 r6 2-1-7-3 ls 8 r7 2-10-12-3 ls 4 r8 11-6-8-9 ls 2 r9 11-10-4-9 ls 3 r10 2-1-4 r11 7-5-12-3 ls 11 good luck