bytewiser-3.js

// had to use http://www.asciitable.com/ .. values should be in instructions, resource should be presented for next problem.
"use strict";

var bl = require('bl');

process.stdin.pipe(bl(function(err, data) {
  for (var k = 0; k < data.length; k++) {
    if (data[k] == 0x2e) data[k] = 0x21;
  }
  console.log(data);
}));