Царевна лягушка

Once upon a time there was a king and a queen, and they had three sons. The time has come for the sons to look for wives for themselves. They fired arrows in different directions - in whose yard the arrow hit, there is the bride. The elder brothers got the general's and the merchant's daughters, and Ivan Tsarevich's arrow fell into the forest swamp right to the frog. There is nothing for the prince to do - he took the word to marry.