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  1. u= [4,7,5,2,3,9];
  2. u.sort();
  3. System.out.println(u);
Runtime error #stdin #stdout #stderr 0.01s 9992KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
Traceback (most recent call last):
  File "./prog.py", line 3, in <module>
NameError: name 'System' is not defined