filter 함수

const words = ['강아지간식', '강아강아', '고양이', 
               '강아지', '강아지패드', '강아지사료'];

const result = words.filter((word) => word.includes('강아지'));

console.log(result); 
['강아지간식', '강아지', '강아지패드', '강아지사료']