symbolic n,lb,ub;
I5 := {[k,j] : 1 <= k < j <= n};
I7 := {[k,j,i] : 1 <= k < j,i <= n};
T5 := {[k,j] -> [k,j,1,0]};
T7 := {[k,j,i] -> [i,j,0,k]};
D57 := {[k,j] -> [k,j,i] : 1 <= k < j,i <= n};
D75 := {[k,j,k+1] -> [k+1,j] : 1 <= k <= j-2 && j <= n} union
	{[k,k+1,k+1] -> [k+1,j'] : 1 <= k <= j'-2 && j' <= n};
D77 := {[k,j,i] -> [k+1,j,i] : 1 <= k <= i-2, j-2 && j <= n && i <= n}
	union
	{[k,k+1,i] -> [k+1,j',i] : 1 <= k <= i-2, j'-2 && j' <= n && i <= n};
difference ( (inverse T5) join D57 join T7 );
difference ( (inverse T7) join D75 join T5 );
difference ( (inverse T7) join D77 join T7 );
codegen T5:I5,T7:I7;
codegen 2 T5:I5,T7:I7;
codegen 3 T5:I5,T7:I7;