remote jupyter connection

mona@goku:~$ ssh -N -f -L 127.0.0.1:8885:127.0.0.1:8887 jalal@goku.bu.edu
jalal@goku.bu.edu's password:
bind [127.0.0.1]:8885: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8885
Could not request local forwarding.
mona@goku:~$ ssh -N -f -L 127.0.0.1:8889:127.0.0.1:8887 jalal@goku.bu.edu
jalal@goku.bu.edu's password: