anchor.diff:  
   rand_hash(Size) ->
     Rand = crypto:strong_rand_bytes(Size),
  -  Base = base64:encode(Rand),
  -  WordSize = string:words(Base),
  -  string:sub_string(Base, 0, WordSize - 3).
  +  BinBase = base64:encode(Rand),
  +  Base = binary_to_list(BinBase),
  +  lists:sublist(Base, 1, Size).
   
   next_page(#pagination{from = From, count = Count}) -> #pagination{from = From + Count, count = Count}.
   
  
positive.code: -export([
           puts/1,
           rand_hash/1,
           time/0,
           next_page/1,
           decode_json/1
          ]).
  
negative.code: -endif.
  
  puts(Value) -> io:format(user, "~p~n", [Value]).
  
  decode_json(Data) ->
    JsonData = jiffy:decode(Data, [return_maps]),
  