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export default function CheckPermutation(s1: string, s2: string): boolean {    if (s1.length !== s2.length) {        return false;    }    const table: number[] = new Array(26).fill(0);    for (let i = 0; i < s1.length; ++i) {        table[s1.charCodeAt(i) - "a".charCodeAt(0)]++;    }    for (let i = 0; i < s2.length; ++i) {        table[s2.charCodeAt(i) - "a".charCodeAt(0)]--;        if (table[s2.charCodeAt(i) - "a".charCodeAt(0)] < 0) {            return false;        }    }    return true;}