Tolonggg bantu akuuu

Tolonggg bantu akuuu

No. 1A

${ p }, { q }, { r }, { s }$

No. 1B

${ p, q }, { p, r }, { p, s }, { q, r }, { q, s }, { r, s }$

No. 1C

${ p, q, r }, { p, q, s }, { q, r, s }$

No. 1D

${ p, q, r, s }$