I am trying to write a Python program as following:

```
list_a = []
list_b = []
list_c = []

listName  = str(input('insert list name: '))
listValue = int(input('insert value: '))
    listName.append(listValue)

```

But unfortunately "listName.append()" won't work.

Using only IF functions as in:

```
    if listName == 'list_a':
        list_a.append(listValue)

```

is impractical because I am actually working with 600+ lists...

Is there any other way I could do to make something like this work properly??

Help is much appreciated!

Thank you very much in advance!!