/**
 * Drops soft sign and makes its left-ajacent
 * letter upper-case for later indication
 */
export declare function hideSoftSign(cyrillicWord: string): string;
/**
 * Adds soft sign to the right of upper-case character
 */
export declare function recoverSoftSign(cyrillicWord: string): string;
/**
 * Splits cyrillic iotas (vovels with 2 phonemas: я,ё,ю,е)
 * into 2 letters (ya,yo,yu,ye) to correctly calculate
 * consonant distance between 2 vovels.
 */
export declare function extractIotaConsonants(cyrillicWord: string): string;
/**
 * Unifies split cyrillic iotas (vovels with 2 phonemas: ya,yo,yu,ye)
 * into corresponding cyrillic letters (я,ё,ю,е)
 */
export declare function recoverIotas(cyrillicWord: string): string;