test

function handle_company(args, cb) {
   const result = {};

   args.forEach(str => {
     const [key, value] = str.split(" -> ");
     if (!result[key]) {
       result[key] = [];
     }
     result[key].push(value);
   });
   cb(result);
 }

 handle_company(
   [
     "SoftUni -> AA12345",
     "SoftUni -> BB12345",
     "SoftUni -> AA12345",
     "Microsoft -> CC12345",
     "HP -> BB12345"
   ],
   result => {
    let keys = Object.keys(result).sort((a,b)=> a.localeCompare(b));
     for (const key of keys) {
       console.log(key);
       let filteredNum = result[key].filter((value,ind)=> result[key].indexOf(value) === ind)
       for (const value of filteredNum) {
         console.log("-- ", value);
       }
     }
   }
 )