"Humans," Ken supplies, deducing that the listed body parts are common among groups of people in this other world. Wormmon's eyes go round, and his mandibles part in a soft "ohhhhh" sound. Ken-chan figured it out! He figured it out from so little!

"Ken-chan, you're so smart!"

"Humans - hyur - are common in my home world," Ken then provides for the other half of this conversation. "Until today, I'd only met humans with partner Digimon."