// expected output
#expect 1
#expect 20

#ship debug        : Debug
#ship fifo         : Fifo

debug.in:
  setflags a=1, b=b;
  [a]  literal 1;
  [!a] literal 0;
  deliver;
  literal 0;
  literal 1;
  setflags a=0, b=b;
  nop;
  [!a] literal 20;
  deliver;