foo.cc:2:7: error: expected nested-name-specifier before 'spacemane'
    2 | using spacemane std;
      |       ^~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:6:17: error: expected primary-expression before 'else'
    6 |                 else
      |                 ^~~~
foo.cc:9:17: error: expected primary-expression before 'else'
    9 |                 else
      |                 ^~~~

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