+| S : nat \ 5span class="error" title="Parse error: SYMBOL '.' expected after [grafite_ncommand] (in [executable])"\ 6\ 5span class="error" title="Parse error: SYMBOL '.' expected after [grafite_ncommand] (in [executable])"\ 6\ 5span class="error" title="Parse error: SYMBOL '.' expected after [grafite_ncommand] (in [executable])"\ 6→\ 5/span\ 6\ 5/span\ 6\ 5/span\ 6 nat.