Letters that make filename extension
s, a, o, e, f, l, n, m, t, i, x are letters that make 'filename extension'
Words within filename extension
file, Sion, AM, filename, te, si, XT, en, SI, ex, on, ten, il, tension, extension, name, IL, ME, Io, ion, Lena, LE, Am, Si, Na, Te are words within 'filename extension'