1 2 3 are the vertices of a triangle
11 13 29 31 are not the vertices of an acceptable figure
26 11 13 24 are the vertices of a parallelogram
4 5 9 13 12 7 are the vertices of a hexagon
1 2 3 4 5 are not the vertices of an acceptable figure
47 are not the vertices of an acceptable figure
11 13 23 25 are not the vertices of an acceptable figure
55 5050 4960 are the vertices of a triangle
55 5050 4961 are not the vertices of an acceptable figure
55 5050 4960 18055 are the vertices of a parallelogram
55 5050 4960 18056 are not the vertices of an acceptable figure
3 1 2 are the vertices of a triangle
3 2 1 5 are the vertices of a parallelogram
11 18 17 13 8 7 are the vertices of a hexagon
11 18 16 13 8 7 are not the vertices of an acceptable figure