r1...6-2-8-1
r2...4-6-3-8
r3...7-3-8-5
r4...2-8-1-5
r5...2-1-3-5
r6...3-1-2-6
r7...3-2-4-1
r8...1-5-3-4
r9...1-4-3-2
r10..7-6-1-4
r11..2-7-1-5
r12..2-1-4-6
r13..5-4-3-1

Good Luck