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class WordFilter {    #d = new Map<string, number>();
    constructor(words: string[]) {        const m = new Map<string, number>();        for (const [k, word] of words.entries()) {            m.set(word, k);        }
        const entries = Array.from(m.entries()).sort((a, b) => a[1] - b[1]);        for (const [word, k] of entries) {            for (let i = 1; i <= word.length; i++) {                for (let j = 1; j <= word.length; j++) {                    const pref = word.substring(0, i);                    const suff = word.substring(word.length - j);
                    this.#d.set(hash(pref, suff), k);                }            }        }    }
    f(pref: string, suff: string): number {        return this.#d.get(hash(pref, suff)) ?? -1;    }}
function hash(pref: string, suff: string) {    return pref + "," + suff;}export default WordFilter;