p cnf 10 18
c 1 Chat
c 2 Connection
c 3 Peer 2 Peer
c 4 Server
c 5 Messages
c 6 Text
c 7 Video
c 8 Audio
c 9 Data Storage
c 10 Media Player
1 0
-1 2 0
-2 1 0
-2 3 4 0
-3 -4 0
-3 2 0
-4 2 0
-1 5 0
-5 1 0
-5 6 7 8 0
-6 5 0
-7 5 0
-8 5 0
-9 1 0
-10 1 0
-4 9 0
-7 10 0
-8 10 0