This is the 17569th most frequent Russian word.
труб
"Труб" is the genitive plural form of "труп," meaning "corpse" or "dead body" in English.
In this sentence, 'труб' refers to the pipes of a musical organ, indicating the plural genitive form of the word 'труба'.
Она услышала мелодию из труб органа.
She heard a melody from the pipes of the organ.
Here, 'труб' refers to water or sewage pipes in the house, also utilizing the plural genitive form of the word 'труба'.
После ремонта всех труб в доме стало уютнее.
After repairing all the pipes in the house, it became cozier.
In this context, 'труб' refers to smoking pipes, again showing the plural genitive form of 'труба'.