docs: cartesian product option notes, demo; remove todo because its done

README.md

@@ -10,7 +10,7 @@ Produce a new combination of subdomains - generates permutations P(n,k).
 2. `stdout`: supports standard output.
 3. Works with the next arguments:
 ```
-usage: pnk.py [-h] [-i | -c] [-v] [FILE ...]
+usage: pnk [-h] [-i | -c] [-v] [FILE ...]
 
 Generates a new subdomains on provided input
 
@@ -20,15 +20,15 @@ positional arguments:
 optional arguments:
   -h, --help       show this help message and exit
   -i, --increment  increment any one or two digits on subdomains
-  -c, --cartesian  increment digits on subdomains creating Cartesian product
+  -c, --cartesian  increment digits on subdomains creating their Cartesian product
   -v, --version    show program's version number and exit
 ```
 ```bash
 $ cat subs1.txt subs2.txt | pnk
 ```
 
 ## Make it fast
-WIP: but for now, to turn this single process script into multiprocess use [interlace](https://github.com/codingo/Interlace)
+To turn this single process script into multiprocess use [interlace](https://github.com/codingo/Interlace)
 
 
 # Features
@@ -52,6 +52,19 @@ aws2-3.s11.env2.tesla.com
 aws8-8.s11.env2.tesla.com
 aws9-9.s11.env2.tesla.com
 ...
+```
+Using the cartesian product option:
+```bash
+echo "v0.1-v2.tcsbank.ru" | pnk -c
+v0.dev0-v0.tcsbank.ru
+v1.dev0-v0.tcsbank.ru
+...
+v0.dev1-v0.tcsbank.ru
+v0.dev2-v0.tcsbank.ru
+...
+v9.dev9-v8.tcsbank.ru
+v9.dev9-v9.tcsbank.ru
+
 ```
 
 ## Install & Usage
@@ -65,10 +78,6 @@ $ cat subs1.txt subs2.txt | ./src/pnk/__main__.py
 ```
 
 # Constraints
-### Feature request
-See the open [issue](https://github.com/storenth/pnk/issues/1#issue-2080221058) for the following feature requests:
-- [ ] replace each subs with word in wordlist: v2.test.domain.com -> demo.test.domain.com
-- [ ] prepend/append word by creating new subs: test.domain.com -> demo.test.domain.com, test.demo.domain.com
 ### Limitations
 1. Does't handle incremet option in the following cases: more then two digits:
 ```
@@ -80,12 +89,8 @@ aws.1002030v.amazon.com -> aws.1002030v.amazon.com
 $ pnk < list.txt | massdns -
 ```
 3. Possible out of memory issues when redirecting `stdout` to a file, please read the [Wiki](https://github.com/storenth/pnk/wiki)
-## TODO
-1. Combinations of incrementations (cartesian product of all digits found in each sub): 
-```
-5io5.33.ya.ru -> 0io0.00.ya.ru .. 9io9.99.ya.ru
-```
-How it works now:
-```
-5io5.33.ya.ru -> 0io5.00.ya.ru .. 9io5.99.ya.ru .. 5io0.00.ya.ru .. 5io9.99.ya.ru
-```
+
+### Feature request
+See the open [issue](https://github.com/storenth/pnk/issues/1#issue-2080221058) for the following feature requests:
+- [ ] replace each subs with word in wordlist: v2.test.domain.com -> demo.test.domain.com
+- [ ] prepend/append word by creating new subs: test.domain.com -> demo.test.domain.com, test.demo.domain.com