Letters that make modal auxiliary
a, o, d, l, m, r, i, u, y, x are letters that make 'modal auxiliary'
Words within modal auxiliary
OD, DA, liar, ar, dal, AU, XI, mod, auxiliary, xi, il, li, modal, AL, AR, IL, IA, MO, Al, Ar, Au, Li, Mo, mo are words within 'modal auxiliary'