first ot all ,celebrate to two group which have 6 in a group
- k+ n2 ]( D0 H6 Q* G- _and then celebrate again to 3 in a group from which more heavier+ r) N5 c7 m$ }/ }
lastly, take two ping pongs from the heavier group and put in5.39.217.76" ?' c% c1 q) ?& A! o4 w' R! F/ v
when there are same quality 7 n5 }& ]2 _) m( S2 c
that's mean the third ping pong is different
, q( A" q$ `" c9 ~. g3 ?' _, |9 Y/ D; T5 `! B
i got it in 1 minute |