function pirates(input) {
   const cities = {};
   let city = input.shift();

   while (city !== 'Sail') {
     const [name, population, gold] = city.split('||');

     if (!cities.hasOwnProperty(name)) {
       cities[name] = {
         population: Number(population),
         gold: Number(gold),
       };
     } else {
       cities[name].population += Number(population);
       cities[name].gold += Number(gold);
     }

     city = input.shift();
   }

   let line = input.shift();

   while (line !== 'End') {
     const [command, townName, ...params] = line.split('=>');

     switch (command) {
       case 'Plunder':
         const [citizens, goldAmount] = params.map((x) => Number(x));

         cities[townName].population -= citizens;
         cities[townName].gold -= goldAmount;

         console.log(
           `${townName} plundered! ${goldAmount} gold stolen, ${citizens} citizens killed.`
         );

         if (cities[townName].population <= 0 || cities[townName].gold <= 0) {
           console.log(`${townName} has been wiped off the map!`);
           delete cities[townName];
         }
         break;
       case 'Prosper':
         const [gold] = params.map((x) => Number(x));

         if (gold < 0) {
           console.log('Gold added cannot be a negative number!');
         } else {
           cities[townName].gold += gold;
           console.log(
             `${gold} gold added to the city treasury. ${townName} now has ${cities[townName].gold} gold.`
           );
         }

         break;
     }

     line = input.shift();
   }

   const citiesCount = Object.keys(cities).length;

   if (citiesCount === 0) {
     console.log(
       'Ahoy, Captain! All targets have been plundered and destroyed!'
     );
     return;
   }

   console.log(
     `Ahoy, Captain! There are ${citiesCount} wealthy settlements to go to:`
   );

   for (const city in cities) {
     console.log(
       `${city} -> Population: ${cities[city].population} citizens, Gold: ${cities[city].gold} kg`
     );
   }
 }