Train tokens

function train(array) {
   let wagons = array. shift()
   .split(' ')
   .map(Number);
   let maxCapacity=Number(array.shift());
      for (let line of array) {
          let tokens = line.split(' ');
        if (tokens.length===2) {
            wagons.push(Number(tokens[1]));
        } else {
           let passengersCount = Number(tokens[0]);
           for (let i = 0; i < wagons.length; i++) {
               let currentCapacity = wagons[i];
               if (currentCapacity+passengersCount<=maxCapacity) {
                   wagons[i]+=passengersCount;
                   break;
               }
           }
        }
    }
    console.log(wagons.join(' '));
}