function solve (arr) {

  let words = arr.shift().split(' ');

  let obj = {};

  let arr2 = [];


  arr.forEach(el => words.includes(el) ? obj[el] = (obj[el] || 0) + 1 : false);

  // console.log(obj);

  let sortedArr = Object.entries(obj).sort((a, b) => b[1] - a[1]);

  // console.log(sortedArr);


  for (let [key, value] of sortedArr) {

    console.log(`${key} - ${value}`);

  }


}