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  1. f = lambda s,t,e=enumerate:[s[i:j]for j,_ in e(s,i)for i,_ in e(s)if(s[i:j]in t)<1][0]
  2.  
  3. for t in 'abd', 'abbc', 'aaa', 'bca', 'abcd':
  4. print(f('abc', t))
Runtime error #stdin #stdout #stderr 0.04s 9984KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
Traceback (most recent call last):
  File "./prog.py", line 4, in <module>
  File "./prog.py", line 1, in <lambda>
NameError: name 'i' is not defined