Which DB2 Client is working with DB2 Server v8.2, 9.1 and 10.1

hello

we have different DB2 Server versions (8.2 and 9.1) and we plan to migrate some of the DB2 v9 databases to v10.1.
At the moment all clients are running in the version v8, but these clients will have to connect to the v8 databases as well as to the v10 databases.
Which would be the best Client version compatible with the Server versions: 8.2, 9.1 and 10.1?

Thank a lot in advance
best regards
Renaud