import re
 
df = '''
ACCP ACLL ADER ADERW AEAC AEACW AHI AIRTP AKO/A AKO/B ALIT AMHCU ANDAU APOPW AUGZ AUUD AUUDW 
AVDG AVDR AYTUP BBRX BCAC BCACU BCACW BCTX BCTXW BF/A BF/B BIO/B BRK/A BRK/B BRLIU BRPAU BWL/A 
CCZ CFCV CMCTP CMPX CNNB CNTX COMSW CPTAG CPTI CRD/A CRD/B CRTDW DDI DECZ DEFN DFH DRMT DSOC EAC 
EACPW: No data found, symbol may be delisted- ECC : No data found, symbol may be delisted- ECOM :
No data found, symbol may be delisted
'''
 
result = ' '.join(re.findall(r"\b[A-Z]+[A-Z\/]+\b", df))
print(result)

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