#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

require 'base64'

table = Hash[*"䷀䷪䷍䷡䷈䷄䷙䷊䷉䷹䷥䷵䷼䷻䷨䷒䷌䷰䷝䷶䷤䷾䷕䷣䷘䷐䷔䷲䷩䷂䷚䷗䷫䷛䷱䷟䷸䷯䷑䷭䷅䷮䷿䷧䷺䷜䷃䷆䷠䷞䷷䷽䷴䷦䷳䷎䷋䷬䷢䷏䷓䷇䷖䷁".split("").zip("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("")).flatten]
puts Base64.decode64((gets.split("").map {|c| table[c]}).join)