foo.cc: In function 'int main()':
foo.cc:6:95: error: expected ';' before string constant
    6 |    cout<<"123 153 183 213 243"<<endl<<"273 303 333 363 393"<<endl<<"423 453 483 513 543"<<endl"573 603 633 663 693"<<endl<<"723 753 783 813 843"<<endl<<"873 903 933 963 993";
      |                                                                                               ^~~~~~~~~~~~~~~~~~~~~
      |                                                                                               ;

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