Letters that make indistinguishable
s, a, b, d, e, g, l, n, h, t, i, u are letters that make 'indistinguishable'
Words within indistinguishable
AB, ab, GUI, ti, ting, ng, HA, able, distinguishable, GU, in, sting, tin, IN, ND, Dis, LE, NGU, In, Nd, Ti, Ab, distinguish are words within 'indistinguishable'