TRAÇA-LETRA E TRAÇA-TUDO

Moth-Letra and Moth-Everything have been friends since they were little. They live in an old and dusty library, hidden in the basement of a museum, among old books and documents.

Despite their friendship and being so similar, the two moths have very different temperaments. Traça-Tudo is very greedy and devours everything in sight. Traça-Letra, on the other hand, likes to savor letters and words.

One afternoon, after the traditional lunch nap, Moth-Letra wakes up scared by her friend's screams:

― Ow... Ow... Ow...! What a stomach ache!

What did Traça-Tudo eat to have this indigestion?