A pair of double le _ _ ers has b _ _ n removed from each of the co _ _ on words below.
But take h _ _ d;   each word's spaces can be fi _ _ ed by two such pairs, but you ca _ _ ot
use any pair more than once.   Using logic, you must d _ _ m which mi _ _ ing pair goes where;
it's stu _ _ ing that there is only one co _ _ ect solution.
P U _ _ L E S A _ _ E S T I N G D I _ _ I D E N T S U _ _ E N S U _ _ E R T I M E S N U _ _ E D F L I _ _ E R S G A Z E _ _ E S B O _ _ O W D R I _ _ L I N G C A _ _ I L Y S T A _ _ E R I N G B A _ _ L E M E N T A _ _ E S S E D S T R A _ _ L E R Choose from: bb, cc, dd, ff, gg, ll, mm, nn, pp, rr, ss, tt, vv, ww, zz