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` 
     ); 
   } 
 }