01. Dictionary 90/100

function solve(input = []) {
  let wordsAndDescriptions = input.shift().split(" | ");
  let words = input.shift().split(" | ");
  let command = input.shift();
  let dictionary = {};
  let keys = [];

  for (const current of wordsAndDescriptions) {
    let [word, description] = current.split(": ");

    if (!Object.keys(dictionary).includes(word)) {
      dictionary[word] = [];
      dictionary[word].push(description);
      keys.push(word);
    } else {
      dictionary[word].push(description);
    }
  }

  if (command === "End") {
    let entries = Object.entries(dictionary).sort((a, b) => a[0].localeCompare(b[0]));
    for (const [key, values] of entries) {
      values.sort((a, b) => b.length - a.length);
      console.log(key);
      values.forEach(value => console.log(` -${value}`));
    }
  } else if (command === "List") {
    let sortedKeys = keys.sort((a, b) => a.localeCompare(b));
    console.log(sortedKeys.join(" "));
  }
}