if (os[k].empty() && os_r[kk].empty()) {
// No, there is no snake at all, in which case
// the length of the shortest edit script is M+N.
if (os[k].empty() && os_r[kk].empty()) {
// No, there is no snake at all, in which case
// the length of the shortest edit script is M+N.
pit_type const pit = it.o.pit() - rp.o.from.pit();
pos_type const pos = pit ? it.o.pos() : it.o.pos() - rp.o.from.pos();
inset = pars[pit].getInset(pos);
pit_type const pit = it.o.pit() - rp.o.from.pit();
pos_type const pos = pit ? it.o.pos() : it.o.pos() - rp.o.from.pos();
inset = pars[pit].getInset(pos);