Obfuscate is failing intermittently with list index out of range

[adarshrtech]

While running the rancher2_logs_collector.sh script with the Obfuscate (-o) option, it sometimes failed with the following error.

processing file: iplinkshow
processing file: ss4apn
processing file: ip6tablesmangle
processing file: iptables
Traceback (most recent call last):
  File "<stdin>", line 186, in <module>
  File "<stdin>", line 162, in process_file
  File "<stdin>", line 131, in obfuscate_text
  File "<stdin>", line 80, in obfuscate_hostname
  File "<stdin>", line 80, in <listcomp>
  File "<stdin>", line 72, in obfuscate_subdomain
  File "<stdin>", line 23, in generate_word
  File "<stdin>", line 44, in generate_adv
  File "/usr/lib/python3.10/random.py", line 378, in choice
    return seq[self._randbelow(len(seq))]
IndexError: list index out of range

In a test cluster where it failed, the number of Hostname/IP mappings were as below and a successful run on the same cluster had 3714/354 created

# cat hostname_mapping.json | wc -l
2346
# cat ip_mapping.json | wc -l
78

During successful run too, some of the hostnames are visible like below

ip-172-31-40-225 NotReady <none> 5d23h v1.31.3+rke2r1 172.braggingly.fantasy.better <none> Ubuntu 22.04.5 LTS 6.8.0-1035-aws containerd://1.7.23-k3s2

In addition to that, both IP and hostname are present in the file path rke2/kubectl/rancher-prov/nodes.management.cattle.io