import re
items = ['There is some random information here',
'This includes item p23344dd5 as well as other info',
'K3455 $100.00',
'Line4: ''Last part number here 5551234']
for item in items:
x = re.search(r'(?<!\S)(?=\w{5})\w*\d\w*(?!\S)', item)
if x:
print(x.group())
aW1wb3J0IHJlCgppdGVtcyA9IFsnVGhlcmUgaXMgc29tZSByYW5kb20gaW5mb3JtYXRpb24gaGVyZScsCiAgICAgICAgICdUaGlzIGluY2x1ZGVzIGl0ZW0gcDIzMzQ0ZGQ1IGFzIHdlbGwgYXMgb3RoZXIgaW5mbycsCiAgICAgICAgICdLMzQ1NSAkMTAwLjAwJywKICAgICAgICAgJ0xpbmU0OiAnJ0xhc3QgcGFydCBudW1iZXIgaGVyZSA1NTUxMjM0J10KCmZvciBpdGVtIGluIGl0ZW1zOgogICAgeCA9IHJlLnNlYXJjaChyJyg/PCFcUykoPz1cd3s1fSlcdypcZFx3Kig/IVxTKScsIGl0ZW0pCiAgICBpZiB4OgogICAgCXByaW50KHguZ3JvdXAoKSk=