Letters that make data hierarchy
a, d, e, c, h, r, t, i, y are letters that make 'data hierarchy'
Words within data hierarchy
DAT, ER, IE, hi, ERA, hierarchy, DA, arc, ar, at, hie, arch, ie, data, RA, AR, HI, Ra, hierarch, Ar, At, Er, Ta, era are words within 'data hierarchy'