package Ġcom . pio tr walk us z . learn language from books . core . word counter Ċ Ċ import Ġjava . io . Reader Ċ Ċ interface ĠWord Counter Ġ{ ĊĊĠĠĠ Ġfun Ġcount Words ( source : ĠReader , Ġdictionary : ĠSet < String >): ĠMap < String , ĠInt > Ċ }