/in/foo.c: In function 'main':
/in/foo.c:15:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(b==4 || b==6 || b==9 || b==11)
     ^~
/in/foo.c:17:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  return 0;
  ^~~~~~