[cal828]

R11

$5 Tri 5//1,4,7//1,4,7=$30

$5 Tri 1,4,7//5//1,4,7=$30

$1 Tri 5//1,4,6,7//1,4,6,7,8=$16

$1 Tri 5//1,4,6,7//1,4,6,7=$12

$1 Tri 1,4,6,7//5//1,4,6,7=$12