foo.cc: In function 'int main()':
foo.cc:13:7: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'pusn_back'; did you mean 'push_back'?
   13 |    sc.pusn_back(' ');
      |       ^~~~~~~~~
      |       push_back

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