old_contents: var Grid = require('./../model/grid').default;
  var robotFactory = require('./../service/robot_factory').default;
  var processMove = require('./../service/move').default;
  
  export default (req, res, next) => {
    const grid = new Grid(req.body.upperX, req.body.upperY);
    const robots = robotFactory(req.body.robots);
    console.log(robots);
    res.json(processMove(grid, robots));
    next();
  }
  
new_contents: var Grid = require('./../model/grid').default;
  var robotFactory = require('./../service/robot_factory').default;
  var processMove = require('./../service/move').default;
  
  export default (req, res, next) => {
    const grid = new Grid(req.body.upperX, req.body.upperY);
    const robots = robotFactory(req.body.robots);
    res.json(processMove(grid, robots));
    next();
  }
  
subject: remove log