text: function contamination(text, char){
  
      if (!text || !char) return "";
      return text.split("").reduce((acc,curr,idx) => {
          acc += char;
          return acc;
      },"");
  
    }
  console.log(
      contamination("abc","z"),// "zzz")
      contamination("","z"), //"")
      contamination("abc",""),// "")
      contamination("_3ebzgh4","&"),// "&&&&&&&&")
      contamination("//case"," "), //"      ")
  )