Surely, it should be OK to say: You run because the cat is in trouble
"koska" sounds like "кошка" - a femail cat
"kissa" sounds like "киса" - a cute cat
"koti" sounds like "котик" - a cute male cat
Please make a sentace with all these words to confuse Russians.
oh, and "mur" is what cats say in Russian.
I don't understand why "You run" is not acceptable, especially in basic Finnish. More advanced student might understand if there is some subtle difference, but not beginners! Thank you for your attention to this.
It is now.