fcn ccnt(textInBitBucket){
   letters:=["a".."z"].pump(List().write,0); // array of 26 zeros
   textInBitBucket.howza(0).pump(Void,'wrap(c){  // pump text as ints
      if(97<=c<=122)     c-=97;
      else if(65<=c<=90) c-=65;
      else return(Void.Skip);
      letters[c]+=1
   });
   sum:=letters.sum(); println(sum," letters");
   letters.enumerate().pump(List,'wrap([(c,n)]){
      "%s(%d:%d%)".fmt((c+65).toChar(),n,n*100/sum)})
   .concat(",").println();
}

ccnt(Data(0,Int,"This is a test"));
ccnt(File("dict.txt").read());