Assume I am executing nmap shell to find out a simple output.We are all familiar with this one:

```
Starting Nmap 6.47 ( http://nmap.org ) at.... 
Nmap scan report for www.google.com (172.217.26.68)
Host is up (0.085s latency).
rDNS record for 172.217.26.68: sin10s02-in-f68.1e100.net
Not shown: 998 filtered ports
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 9.38 seconds

```

Now I want the port state and service specifically
For example:

```
Open ports are:
80
443

```

or something like this.The point is I want to use a specific output and use it somewhere else.Can anyone give me a very very simple example?