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% vim: ts=4 sw=4 et ft=mercury
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:- module empty_command.
:- interface.
:- import_module io.

:- pred main(io__state::di, io__state::uo) is det.

:- implementation.

main -->
    { p(53, P) },
    io__write_int(P),
    io__nl.

:- pred p(int::in, int::out) is det.
:- pred q(int::in, int::out) is det.
:- pred r(int::in, int::out) is det.
:- pred s(int::in, int::out) is det.

p --> q, r, s.
q --> [].
r --> [].
s --> [].