[ At the bio lab ] 

Tr . Ahn explained about the big project and we will make a couple . 

Tr Ahn : Taecyeon with Yoona , Seohyun with Chansung , Wooyoung with Tiffany , Junho with Sunny ,Nickhun with Yuri , Junsu with Taeyeon . Key with Jessica , Jonghyun with Sooyoung and lastly Taemin with Hyoyeon . 

Tr Ahn : The clue is : 5,0,2  , after you done solving in a A4 paper draw it ! START ! 

Taecyeon : Do you understand ? 

Yoona : Quite ! 

Seohyun : Oppa try to point 5 ! What do you think about it  ? 

Chansung : Paper ? How about 0 , try to point ? What do you think of it ?

Seohyun : Stone ? 

Seochan : We've solved it ! 

Seochan : Lets draw ! 

what is it ?