First, dont beat yourself up, there is never any stupidity, an intelligent person always is willing to ask a question for guidance so that they may obtain an answer.....
Do you happen to know what the priest is saying to begin with
Christ is Among Us(in our midst)-Response: He is, and shall be!
Христос посеред нас! І є, і буде!
Christos posred’i nas! Jest’i budet
Or is it a specific time (i.e. Christmas, Christ is Born, Easter, Christ is Risen, Theopany, Christ is Baptised, etc).
You will forgive me as my Ukrainian is very limited but I have a Ukrainian Catholic Cantor friend, I am sure he could help us out if I sent off an email asking for info on what you need.