KöMaL 2026 K904

There are three streets in a village: street $T$, $V$ and $P$. People in $T$ street always tell the truth, people in $V$ street always lie, and people $P$ street tell the truth and lie alternately. One day the watchman on duty in the fire tower of the village saw a column of smoke rising from one of the streets. A few seconds later the telephone rang. The caller said only this: There is fire in the street!' The watchman on duty asked: Which street?' The caller answered: `On $P$ street.' Which street did the firefighters have to go to?