H86 Example 2: Providing text alternatives for ASCII art, emoticons, and leetspeak

Figure 1: ASCII art picture of a butterfly. Skip ASCII image
                                                
                                                                    LLLLLLLLLLL
                                                                __LLLLLLLLLLLLLL
                                                            LLLLLLLLLLLLLLLLL
                                                            _LLLLLLLLLLLLLLLLLL
                                                            LLLLLLLLLLLLLLLLLLLL
                                                        _LLLLLLLLLLLLLLLLLLLLL
                                                        LLLLLLLLLLLLLLLLLLLLLL
                                                L     _LLLLLLLLLLLLLLLLLLLLLLL
                                                LL     LLLLLL~~~LLLLLLLLLLLLLL
                                                _L    _LLLLL      LLLLLLLLLLLLL
                                                L~    LLL~        LLLLLLLLLLLLL
                                            LL   _LLL        _LL   LLLLLLLL
                                            LL    LL~         ~~     ~LLLLLL
                                            L   _LLL_LLLL___         _LLLLLL
                                            LL  LLLLLLLLLLLLLL      LLLLLLLL
                                            L  LLLLLLLLLLLLLLL        LLLLLL
                                            LL LLLLLLLLLLLLLLLL        LLLLL~
                    LLLLLLLL_______       L _LLLLLLLLLLLLLLLL     LLLLLLLL
                            ~~~~~~~LLLLLLLLLLLLLLLLLLLLLLLLL~       LLLLLL
                        ______________LLL  LLLLLLLLLLLLLL ______LLLLLLLLL_
                    LLLLLLLLLLLLLLLLLLLL  LLLLLLLL~~LLLLLLL~~~~~~   ~LLLLLL
                ___LLLLLLLLLL __LLLLLLLLLLLLL LLLLLLLLLLLLL____       _LLLLLL_
            LLLLLLLLLLL~~   LLLLLLLLLLLLLLL   LLLLLLLLLLLLLLLLLL     ~~~LLLLL
        __LLLLLLLLLLL     _LLLLLLLLLLLLLLLLL_  LLLLLLLLLLLLLLLLLL_       LLLLL
        LLLLLLLLLLL~       LLLLLLLLLLLLLLLLLLL   ~L ~~LLLLLLLLLLLLL      LLLLLL
    _LLLLLLLLLLLL       LLLLLLLLLLLLLLLLLLLLL_  LL      LLLLLLLLL   LLLLLLLLL
    LLLLLLLLLLLLL        LLLLLLLLLLLLL~LLLLLL~L   LL       ~~~~~       ~LLLLLL
    LLLLLLLLLLLLLLL__L    LLLLLLLLLLLL_LLLLLLL LL_  LL_            _     LLLLLL
    LLLLLLLLLLLLLLLLL~     ~LLLLLLLL~~LLLLLLLL   ~L  ~LLLL          ~L   LLLLLL~
    LLLLLLLLLLLLLLLL               _LLLLLLLLLL    LL  LLLLLLL___     LLLLLLLLLL
    LLLLLLLLLLLLLLLL              LL~LLLLLLLL~     LL  LLLLLLLLLLLL   LLLLLLL~
    LLLLLLLLLLLLLLLL_  __L       _L  LLLLLLLL      LLL_ LLLLLLLLLLLLLLLLLLLLL
    LLLLLLLLLLLLLLLLLLLL        L~  LLLLLLLL      LLLLLLL~LLLLLLLLLLLLLLLL~
    LLLLLLLLLLLLLLLLLLLL___L_ LL   LLLLLLL       LLLL     LLLLLLLLLLLLLL
    ~~LLLLLLLLLLLLLLLLLLLLLLLL     LLLLL~      LLLLL        ~~~~~~~~~
            LLLLLLLLLLLLLLLLLL_ _   LLL       _LLLLL
                ~~~~~~LLLLLLLLLL~             LLLLLL
                            LLLLL              _LLLLLL
                            LLLLL    L     L   LLLLLLL
                            LLLLL__LL    _L__LLLLLLLL
                            LLLLLLLLLL  LLLLLLLLLLLL
                            LLLLLLLLLLLLLLLLLLLLLL
                                ~LLLLLLLLLLLLLLLLL~~
                                LLLLLLLLLLLLL
                                    ~~~~~~~~~