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#7
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R5
$1 Tri 2//3,4,5,6//3,4,5,6=$12 $1 Tri 3,4,5,6//2//3,4,5,6=$12 $3 Tri 2,4//2,4//3,5,6,7=$24 R6 $1 Tri 4//1,3,6,8//1,3,6,8=$12 $1 Tri 1,3,6,8//4//1,3,6,8=$12 $3 Tri 4,6//4,6//1,3,5,8=$24 $1 Tri 4,6//4,6//1,8=$4 |