The words 1. pañcat and 2. daśat in combination with varga may be anomalously so formed, in the sense of 'this is its measure'.,
This ordains डति instead of कन् 5.1.22, which also comes in the alternative. As पंचद्वर्गः, दशद्वर्गः or पंचकोवर्गः, दशकोवर्ग ॥,