rot13.hgn

#! /bin/sh
exec huginn --no-argv -E "${0}" "${@}"
#! huginn

import Algorithms as algo;
import Operators as oper;

rot13char( c ) {
	if ( c.is_alpha() ) {
		x = integer( c );
		m = integer( c.is_upper() ? 'A' : 'a' );
		x -= m;
		x += 13;
		x %= 26;
		x += m;
		c = character( x );
	}
	return ( c );
}

rot13( s ) {
	return (
		algo.reduce(
			algo.map(
				algo.map( s, rot13char ),
				string
			),
			oper.add
		)
	);
}

main() {
	while ( ( line = input() ) != none ) {
		print( rot13( line.strip() ) + "\n" );
	}
}