R1 
Router#show ip ospf neigh
Neighbor ID     Pri   State           Dead Time   Address         Interface
10.9.0.0          1   FULL/-          00:00:40    10.9.0.0        Serial0/0/0
Router#

R2

Router#show ip ospf neigh
Neighbor ID     Pri   State           Dead Time   Address         Interface
10.12.0.0         1   FULL/-          00:00:37    10.12.0.0       Serial0/0/0