Find Uppercase Words with Regex

Question

I have a string that looks like this:

df = \'\'\'
ACCP ACLL ADER ADERW AEAC AEACW AHI AIRTP AKO/A AKO/B ALIT AMHCU ANDAU APOPW AUGZ AUUD AUUDW 
AVDG AVDR AYTU