<?php
 
class Kamus {
    private $data = [];
 
    public function tambah($kata, $sinonim) {
        if (!isset($this->data[$kata])) {
            $this->data[$kata] = [];
        }
        $this->data[$kata] = array_unique(array_merge($this->data[$kata], $sinonim));
    }
 
    public function ambilSinonim($kata) {
        if (isset($this->data[$kata])) {
            return $this->data[$kata];
        } else {
            // Cek apakah kata ini adalah sinonim dari kata lain
            foreach ($this->data as $k => $sinonimList) {
                if (in_array($kata, $sinonimList)) {
                    return [$k];
                }
            }
        }
        return null;
    }
}

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Ymln

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