// See www.openfst.org for extensive documentation on this weighted
  // finite-state transducer library.
  
  #include <fst/flags.h>
  
  DEFINE_string(call_arc_labeling, "input",
                "Which labels to make non-epsilon on the call arc. "
                "One of: \"input\" (default), \"output\", \"both\", \"neither\"");
  DEFINE_string(return_arc_labeling, "neither",
                "Which labels to make non-epsilon on the return arc. "
                "One of: \"input\", \"output\", \"both\", \"neither\" (default)");
  DEFINE_int64(return_label, 0, "Label to put on return arc");
  DEFINE_bool(epsilon_on_replace, false, "Call/return arcs are epsilon arcs?");
  
  int fstreplace_main(int argc, char **argv);
  
  int main(int argc, char **argv) { return fstreplace_main(argc, argv); }