The light emphatic nūn is vowelless. The source chart gives eight available positions; four dual positions and two feminine-plural positions are blank. These are not invitation to invent forms.
PositionActive light nūnPassive light nūn
هُوَلَيَبِيعَنْلَيُبَاعَنْ
هُمَا (م)——
هُمْلَيَبِيعُنْلَيُبَاعُنْ
هِيَلَتَبِيعَنْلَتُبَاعَنْ
هُمَا (ف)——
هُنَّ——
أَنْتَلَتَبِيعَنْلَتُبَاعَنْ
أَنْتُمَا (م)——
أَنْتُمْلَتَبِيعُنْلَتُبَاعُنْ
أَنْتِلَتَبِيعِنْلَتُبَاعِنْ
أَنْتُمَا (ف)——
أَنْتُنَّ——
أَنَالَأَبِيعَنْلَأُبَاعَنْ
نَحْنُلَنَبِيعَنْلَنُبَاعَنْ
A dash means that this position is not used in the specified light-nūn pattern; it is not a printing omission to complete mechanically.