I have a string like this 

```
mystr = "K1_L1_L2  XX"

```

I want to break it to the following format 

```
K1 L1 L2  XX

```

where K1, L1, L2 can be anything but have this format of a char followed by a number. I am doing this in python using the following regex:

```
a = "K1_L1_L2  XX"
re.split("[\c\d\_]+",a)

```

which gives me the following output

```
['K', 'L', 'L', '  ', '.', '']

```

but I want something like this 

```
['K1', 'L1', 'L2', '  ', '.', '']

```

what is the possible workaround?