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export default function findLUSlength(strs: string[]): number {    return Math.max(        -1,        ...strs.filter((str1, i) => {            const check = strs.every((str, j) => {                if (i !== j && isSubseq(str1, str)) {                    return false;                }
                return true;            });
            return check;        }).map((str) => str.length),    );}
const isSubseq = (s: string, t: string) => {    if (s.length > t.length) return false;    let ptS = 0, ptT = 0;    while (ptS < s.length && ptT < t.length) {        if (s[ptS] === t[ptT]) {            ++ptS;        }        ++ptT;    }    return ptS === s.length;};