(George Sicherman)
| {1}
| {2}
| {3} (unique)
| {1,2}
| {1,3} |
{1,4} |
{1,5} |
{2,3} |
{2,4} |
{2,6} |
{3,4} (unique) |
{1,2,3} |
{1,2,4} | (George Sicherman)
{1,2,5} |
{1,2,6} |
{1,2,7} |
{1,3,4} |
{1,3,5} |
{1,3,6} |
{2,3,4} |
{2,3,5} |
{2,3,6} |
{2,3,7} |
{2,3,8} |
{2,3,9} |
{2,4,5} |
{2,4,6} |
{2,4,8} |
{3,4,5} |
|