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  1. f=lambda x:all([x[0]=="#",x[1].isalpha(),x[2:].isalnum()])
  2. f('#')
Runtime error #stdin #stdout #stderr 0.01s 9008KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
Traceback (most recent call last):
  File "prog.py", line 2, in <module>
  File "prog.py", line 1, in <lambda>
IndexError: string index out of range