#!/usr/bin/env node

const pathOr = require('ramda/src/pathOr');

let input = [];

process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', (data) => {
  input.push(data);
});

process.stdin.on('end', () => {
  const str = input.join('');

  const events = JSON.parse(str);

  const s = events.reduce((acc, event) => {
    const pages = pathOr([], ['hosts', 'edges'], event);
    return [...acc, pages];
  }, []);

  console.log(JSON.stringify(s));
});