We are using HUME to teach some phonetics as part of a reading lesson which often requires students to sound out single letters like buh fror B, cuh for C etc. When the learner says these sounds by themselves, Hume does not detect it as a spoken word so it just sits there waiting for a response and then eventually repeats the question. I need it to recognize them saying "buh" as a response and continue to move through the exercise.