#include <stdio.h>
 
int main() {
	int n;
	scanf ("%d",&n);
	for (int i=0; i<n; i++) {
		int x1, y1, x2, y2, x3, y3, a, b, c;
		scanf ("%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3);
		a = (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2);
		b = (x1-x3)*(x1-x3) + (y1-y3)*(y1-y3);
		c = (x3-x2)*(x3-x2) + (y3-y2)*(y3-y2);
		if ( a==b || b==c || a==c )
			printf ("isosceles\n");
		else if ( a+b==c || b+c==a || a+c==b )
			printf ("right\n");
		else if ( a+b>c && b+c>a && a+c>b )
			printf ("acute\n");
		else
			printf ("obtuse\n");
	}
	return 0;
}
 

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4
0 0 1 1 1 0
0 0 1 3 3 0
0 0 1 1 3 0
0 0 1 2 1 0