Process    1 says "Hello, world!".
  Process    3 says "Hello, world!".
  Process    2 says "Hello, world!".
 7 October   2025   1:02:38.576 PM      
 
communicator_mpi(): master process:
  Fortran77/MPI version
  An MPI example program.
 
  The number of processes is    4
 
  Process    0 says "Hello, world!".
  Number of processes in odd communicator  =    2
  Number of processes in even communicator =    2
  Sum of global ID's in even communicator  =    2
  Sum of global ID's in odd communicator  =    4
 
communicator_mpi():
  Normal end of execution.
 
 7 October   2025   1:02:38.629 PM