Software to manipulate a text file (modify and delete texts) using regular expressions RE

var fs = require('fs');

var text = fs.readFileSync('input.txt').toString();
var text = text.replace(/\b[Aa]d{2,}[a-z]*\b/g, "edit");
var text = text.replace(/\b[Dd]d{2,}[a-z]*\b/g, "delete");
fs.writeFileSync('output.txt', text);