-{% set shortname = (host.split('.') | first) %}
-Host {{ host }}.realraum.at r3-{{ shortname }} r3g-{{ shortname }} r3e-{{ shortname }}
- Hostname {{ host }}.realraum.at
+Host {{ hostvars[host].ansible_host }} r3-{{ host }} r3g-{{ host }} r3e-{{ host }}
+ Hostname {{ hostvars[host].ansible_host }}