foo.cc: In function ‘int main()’:
foo.cc:6:15: warning: unknown escape sequence: '\d'
    6 |         cout<<"ckwckwckwckwckwckwckwckwckwckwckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:7:15: warning: unknown escape sequence: '\d'
    7 |         cout<<"ckw                           ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:8:15: warning: unknown escape sequence: '\d'
    8 |         cout<<"ckw  ccccc  k   k  w   w   w  ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:9:15: warning: unknown escape sequence: '\d'
    9 |         cout<<"ckw  c      k k    w   w   w  ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:10:15: warning: unknown escape sequence: '\d'
   10 |         cout<<"ckw  c      k      w w   w w  ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:11:15: warning: unknown escape sequence: '\d'
   11 |         cout<<"ckw  c      k k    w w   w w  ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:12:15: warning: unknown escape sequence: '\d'
   12 |         cout<<"ckw  ccccc  k   k  w       w  ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:13:15: warning: unknown escape sequence: '\d'
   13 |         cout<<"ckw                           ckw\d";
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~