export function toAlphabet(num: number, alphabet: string): string;

export function fromAlphabet(str: string, alphabet: string): number;

export function toBase(num: number, base: number): string;

export function fromBase(str: string, base: number): number;

export let KNOWN_ALPHABETS: any;

export let NUMERALS: string;

export let LETTERS_LOWERCASE: string;

export let LETTERS_UPPERCASE: string;