{3}
{4}
{9}
{11}
{3, 4}
{3, 9}
{3, 11}
{4, 9}
{4, 11}
{9, 11}
{3, 4, 9}
{3, 4, 11}
{3, 9, 11}
{4, 9, 11}
{3, 4, 9, 11}
Created with the Wolfram Language