{3}
{4}
{7}
{8}
{3, 4}
{3, 7}
{3, 8}
{4, 7}
{4, 8}
{7, 8}
{3, 4, 7}
{3, 4, 8}
{3, 7, 8}
{4, 7, 8}
{3, 4, 7, 8}
Created with the Wolfram Language