Set the ℙ𝕖𝕡 accumulator register to zero
 The “zero” command sets the pep machine accumulator or counter to
 zero. The accumulator register may be used for any purpose as seen fit by the
 intrepid linguist, for example for counting  the number of words
 per line. For counting characters or lines it may be easier to use the 
 lines command or the chars command.
 
 
    while [\r\t\f ]; clear; 
    whilenot [:space:]; a+; add " "; print; clear;
    # print the line count after every line or at end of file
    while [\n]; 
    [\n],(eof) { 
      clear; add "(# words: "; count; add ")\n"; print;
      zero; clear;
    } 
    clear;
    (eof) { quit; }