isValidLinux

function isValid(input) {

    let arrays = [
        [
            ['ubuntu'], // satu kata
            ['linux', 'ubuntu'] // dua kata, urutan boleh bolak-balik
        ],
        [
            ['kali'],
            ['linux', 'kali']
        ]
    ]

    let arrInput = input.split(' ').filter(v => v)
    if ((new Set(arrInput)).size !== arrInput.length) {
        // found duplicate items -> invalid
        return false
    }

    for (const arr_ of arrays) {
        for (const arr of arr_) {
            if (arr.length !== arrInput.length) continue
            if (arrInput.every(v => arr.includes(v))) {
                // valid
                return true
            }
        }
    }

    return false
}

console.info(isValid("ubuntu linux"))
console.info(isValid("ubuntu"))
console.info(isValid("linux"))