function solve(input) {


  let pattern = /\#(?<item>[A-Za-z ]+)\#(?<date>\d{2}\/\d{2}\/\d{2})\#(?<calories>[0-9]{0,4}(?=\#)|[1][0]{4}(?=\#))\#|\|(?<item2>[A-Za-z ]+)\|(?<date2>\d{2}\/\d{2}\/\d{2})\|(?<calories2>[0-9]{0,4}(?=\|)|[1][0]{4}(?=\|))\|/gm;

  let arr = [];

  let totalCalories = 0;

  let days = 0;

  let obj = {};


  while ((food = pattern.exec(input[0])) !== null) {

    if (food.groups.item !== undefined) {

      let item = food.groups.item;

      let date = food.groups.date;

      let calories = food.groups.calories;

      totalCalories += Number(calories);

      obj = { item: item, date: date, calories: calories };

      arr.push(obj);


    } else {

      let item = food.groups.item2;

      let date = food.groups.date2;

      let calories = food.groups.calories2;

      totalCalories += Number(calories);

      obj = { item: item, date: date, calories: calories };

      arr.push(obj);

    }

  }



  days = totalCalories / 2000;

  days = Math.floor(days);

  console.log(`You have food to last you for: ${days} days!`);

  if (days > 0) {

    for (let el of arr) {

      console.log(`Item: ${el['item']}, Best before: ${el['date']}, Nutrition: ${el['calories']}`);

    }

  }


}