text: const assert = require('assert');
  const { input, sampleInput } = require('./input');
  const Grid = require('./grid');
  
  let test_grid = new Grid(sampleInput);
  assert.strictEqual(test_grid.calculateShortestPathBetweenAllLocations(), 14);
  
  let grid = new Grid(input);
  console.log(grid.calculateShortestPathBetweenAllLocations());
  