First, I must mention my native language is french, so I may make english mistake!

I try to use sed to catch and delete the lines where the second item in a CSV file contains other characters then numbers.

Here is an example of a OK line :

```
2323421,9781550431209,,2012-07-24 13:30:57,False,2012-07-01 00:00:00,False,118,,1,246501

```

A line that must be deleted :

```
1901461,3002CAN,,2010-09-29 13:46:59,True,,True,,,,

```

or

```
2977837,9782/76132396,,2015-04-27 10:14:47,True,2015-04-26 00:00:00,True,,,,

```

etc...

I'm not sure this is possible to be honest!

Thank you !