First, they walk into the a; section of the library. There, they are confronted by books starting aa;, ab, ac...; az; [Picture (ii)]. Looking more closely at the al; section, they can find books starting ala;, ;alb;,...; alz; [Picture (iii)].
Lehenik eta behin, liburutegiko b sekziora joango dira. Han, ba;, bb, bc...; bd hasitako liburuak aurkituko dituzte [Picture (ii)]. Ondoren, be hasitako sekzioan, bea;, ;beb;,...; bec; hasitakoak aurkituko dituzte [Picture (iii)].