/** ROT-13: trivially obscure/decode a string by mapping a->n, b->o, ..., m->z, n->a, ..., z->m. Installation is the reverse of removal. */
export declare function rot13Word(str: string): string;
/** ROT-13: trivially obscure/decode a string by mapping a->n, b->o, ..., m->z, n->a, ..., z->m. Installation is the reverse of removal. */
export declare function rotNWord(str: string, by: number): string;
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