Letters that make stratified language
s, a, d, e, f, g, l, n, r, t, i, u are letters that make 'stratified language'
Words within stratified language
IED, LAN, language, age, IE, AN, la, ti, Ag, ANG, at, ng, ED, stratified, ratified, GU, ie, rat, RA, LA, Ra, NGU, At, Ge, La, Ti are words within 'stratified language'