\[Подмножества \Longrightarrow \left\{ 10 \right\},\ \left\{ 11 \right\},\ \]
\[\left\{ 12 \right\},\ \left\{ 10;11 \right\},\ \left\{ 10;12 \right\},\ \left\{ 11;12 \right\},\ \]
\[\left\{ 10;11;12 \right\},\left\{ \varnothing \right\}.\]