foo.cc: In function 'int main()':
foo.cc:7:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |  for(int i=0;i<s.size();i++)
      |              ~^~~~~~~~~
foo.cc:16:25: error: 'Right' was not declared in this scope
   16 |  if(c%11==a[a1-1])cout<<Right;
      |                         ^~~~~
foo.cc:18:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  {for(int i=0;i<s.size()-1;i++)cout<<s[i];cout<<c%11;}
      |               ~^~~~~~~~~~~

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