import re
strs = ['1 B, 14/A - P,1C,2A,21 C - A','3P,21B,2-A,1A','3C,2-W,ABC 200','3 Z,ABC 100 - BB','ABC 300,ABC 200','ABC 200,ABC 100','1c/A,2 - z']
for s in strs:
if re.search(r'\b(?:ABC\s+)?1', s):
print(s)
aW1wb3J0IHJlCnN0cnMgPSBbJzEgQiwgMTQvQSAtIFAsMUMsMkEsMjEgQyAtIEEnLCczUCwyMUIsMi1BLDFBJywnM0MsMi1XLEFCQyAyMDAnLCczIFosQUJDIDEwMCAtIEJCJywnQUJDIDMwMCxBQkMgMjAwJywnQUJDIDIwMCxBQkMgMTAwJywnMWMvQSwyIC0geiddCmZvciBzIGluIHN0cnM6CiAgICBpZiByZS5zZWFyY2gocidcYig/OkFCQ1xzKyk/MScsIHMpOgogICAgICAgIHByaW50KHMp
1 B, 14/A - P,1C,2A,21 C - A
3P,21B,2-A,1A
3 Z,ABC 100 - BB
ABC 200,ABC 100
1c/A,2 - z