for any loop _ want to know which matches

[buran]

something like

def lookup(lookup_item, reference, prefix):
    for ref_item in reference:
        full_ref = ''.join((prefix, ref_item))
        if lookup_item.startswith(full_ref):
            s =  len(full_ref) - len(lookup_item)
            return (ref_item, item[s:].split(' ')[0])

PREFIX = "cookie."
REFERENCE = ['A', 'H', 'ABC']
lookup_list = ['cookie.A001', 'cookie.H004', 'cookie.H004 andsomeothertext', 'cookie.ABC031', 'cookie.FAIL002']

result = [lookup(item, REFERENCE, PREFIX) for item in lookup_list]
output1, output2 = zip(*[item for item in result if item])
print(output1)
print(output2)

Output:
('A', 'H', 'H', 'A')
('001', '004', '004', 'BC031')

Hope this could put you on the right path. As you can see there is problem with A/ABC match - you need to explain further how you process such cases.