chrd-0 0 1 5 6 7 9 10; 
chrd-1 11 3 4 6 7 8 10; 
chrd-2 1 2 3 5 6 8 12; 
chrd-3 1 3 5 6 8 9 12; 
chrd-4 1 3 4 6 8 9 12; 
chrd-5 1 2 4 6 8 9 12; 
chrd-6 1 2 4 6 7 9 12; 
chrd-7 1 2 3 5 6 8 10; 
chrd-8 0 3 5 6 7 9 10; 
chrd-9 1 2 3 5 7 9 12; 
chrd-10 0 3 5 6 7 8 10; 
chrd-11 1 2 3 5 6 9 10; 
chrd-12 1 2 3 6 7 9 12; 
chrd-13 11 2 5 6 7 9 10; 
chrd-14 1 2 3 5 6 9 12; 
chrd-15 1 2 3 4 6 8 12; 