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const data = require('./data')
let arr = data
.split(/\n/g).filter(Boolean)
.map(l => l.replace(')','').split(' (contains '))
.map(l => [l[0].split(' '), l[1].split(', ')])
const ingredients = {}
const allergens = {}
for (let i=0; i<arr.length; i++) {
for (let j=0; j<arr[i][0].length; j++) {
let ingredient = arr[i][0][j]
if (!ingredients[ingredient]) { ingredients[ingredient] = [] }
ingredients[ingredient].push(i)
}
for (let k=0; k<arr[i][1].length; k++) {
let allergen = arr[i][1][k]
if (!allergens[allergen]) { allergens[allergen] = [] }
allergens[allergen].push(i)
}
}
const variants = {}
Object.values(allergens).forEach((allergen, i) => {
const iv = Object.entries(ingredients).filter(i => allergen.every(a => i[1].includes(a)))
if (iv) { variants[Object.keys(allergens)[i]] = iv }
})
while (Object.values(variants).some(iv => iv.length > 1)) {
Object.entries(variants).forEach(iv => {
if (iv[1].length === 1) {
Object.keys(variants).forEach(ik => {
if (ik !== iv[0]) {
variants[ik] = variants[ik].filter(x => x[0] != iv[1][0][0])
}
})
}
})
}
const result = Object.entries(variants)
.sort((a, b) => a[0].localeCompare(b[0]))
.map(r => r[1][0][0])
.join(',')
console.log('Answer: ', result)
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