import re
items = ["singer","singing","ing","This is a ing testing singalong"]
pattern = r"\b\w*ing(?!\w*ing$)\w+\b"
for item in items:
result = re.findall(pattern, item)
if result:
print(result)
aW1wb3J0IHJlCgppdGVtcyA9IFsic2luZ2VyIiwic2luZ2luZyIsImluZyIsIlRoaXMgaXMgYSBpbmcgdGVzdGluZyBzaW5nYWxvbmciXQpwYXR0ZXJuID0gciJcYlx3KmluZyg/IVx3KmluZyQpXHcrXGIiCgpmb3IgaXRlbSBpbiBpdGVtczoKCXJlc3VsdCA9IHJlLmZpbmRhbGwocGF0dGVybiwgaXRlbSkKCWlmIHJlc3VsdDoKCQlwcmludChyZXN1bHQpCgk=