Help with spice node labeling

[slackjack]

I'm a new user to spice(2G.6). I have a problem with labeling my nodes. Below I attached the circuit.

Here is my netlist:

Example netlist
V1 1 0 dc 12
r1 1 1 1k
r2 1 2 1k
r3 1 0 1k
.end

I get this error:
Less than 2 connections at node 2.

How can I correct this? Is there any guides that I should follow when labeling nodes?

--thank you.