do not allow number only names for nodes (in order not to collide with the automatic generated ones)
do not allow number only names for nodes (in order not to collide with the automatic generated ones)

zangsir/ANNIS,zangsir/ANNIS,pixeldrama/ANNIS,korpling/ANNIS,korpling/ANNIS,pixeldrama/ANNIS,zangsir/ANNIS,amir-zeldes/ANNIS,amir-zeldes/ANNIS,korpling/ANNIS,zangsir/ANNIS,amir-zeldes/ANNIS,pixeldrama/ANNIS,korpling/ANNIS,amir-zeldes/ANNIS,amir-zeldes/ANNIS,pixeldrama/ANNIS,pixeldrama/ANNIS,zangsir/ANNIS,pixeldrama/ANNIS,amir-zeldes/ANNIS,korpling/ANNIS,zangsir/ANNIS