LFN Context Sub-divisions
LFN1	N1i	N1ii	N1iii	N1iv	N1v	N1vi	N1vii	N1viii
LFN2	N2i	N2ii	N2iii	N2iv	N2v	N2vi	N2vii	N2viii	N2ix
LFN3	N3i	N3ii	N3iii	N3iv
LFN5	N5i	N5ii	N5iii