draft solution(texting from smartphone)

botva

https://algoprog.ru/material/p50

const iter = (first, second, n) => {
 if(isEmpty(first)) return 'second'
 if(isEmpty(second)) return 'first'
 if(n === 1000000) return 'botva'

 const firstCard = head(first)
 const secondCard = head(second)
 return iter(firstCard < secondCard ? headPoped(first) : tailPushed(first, secondCard, firstCard), firstCard > secondCard ? headPoped(second) : tailPushed(second, firstCard, secondCard), n+1)
}