Here are some chords; (C)Dona (G7)nobis (C)pacem, (G7)pacem; (F)dona (C)nobis (G7)pa-(C)cem Do(G7)na (C)nobis (G7)pacem, (F)dona (C)nobis (G7)pa-(C)cem Do(G7)na (C)nobis (G7)pacem, (F)dona (C)nobis (G7)pa-(C)cem