i know!
8 x! n9 o2 g" Q- Hwhen they can have 15 mins discussion.7 `# q7 [8 y* K8 T g1 B3 s2 b
make 1 of them to do a specific job whcih is countingtvb now,tvbnow,bttvb: ^, N1 W- w% C4 Q5 }& e) c* s/ Y
only him can turn on off off the light.
2 m& H, v' s5 W# d; K5.39.217.76Basically, if you are the first time to get in the room, turn on the light, 5.39.217.76$ j+ @; }- o1 w1 x' _
then wait for "the special man" to turn the light off....3 `$ M! |, s3 q& Z& X9 k
when "the special man" count in up to 30 (included himself)4 v$ O) N( m& l0 n5 V/ g
then it is done! |