#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../include/c++/8.2.1
 /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../include/c++/8.2.1/x86_64-pc-linux-gnu
 /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../include/c++/8.2.1/backward
 /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/include
 /usr/local/include
 /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/include-fixed
 /usr/include
End of search list.