Letters that make fixed intonation
a, o, d, e, f, n, t, i, x are letters that make 'fixed intonation'
Words within fixed intonation
ti, NT, nation, Nation, at, ton, IX, ED, fixed, on, ix, in, fix, intonation, IN, Io, ion, At, In, Na, Ti, Xe are words within 'fixed intonation'