import re
text = r'k8s-configuration-int-mbus_config-int-mbus-deployment-db9c64cd-n4tww_central_6d499584'
rx = r'^.*?(?=-(?:[A-Za-z]+[0-9]|[0-9]+[a-zA-Z])[0-9a-zA-Z]*-)'
match = re.search(rx, text)
if match:
print(match.group())
aW1wb3J0IHJlCnRleHQgPSByJ2s4cy1jb25maWd1cmF0aW9uLWludC1tYnVzX2NvbmZpZy1pbnQtbWJ1cy1kZXBsb3ltZW50LWRiOWM2NGNkLW40dHd3X2NlbnRyYWxfNmQ0OTk1ODQnCnJ4ID0gcideLio/KD89LSg/OltBLVphLXpdK1swLTldfFswLTldK1thLXpBLVpdKVswLTlhLXpBLVpdKi0pJwptYXRjaCA9IHJlLnNlYXJjaChyeCwgdGV4dCkKaWYgbWF0Y2g6CiAgICBwcmludChtYXRjaC5ncm91cCgpKQ==