Task: Question Answering
Input (English): Problem: a cube is divided into 512 identical cubelets . each cut is made parallel to some surface of the cube . but before doing that , the cube is painted with green on one set of opposite faces , red on another set of opposite faces , and blue on the third set of opposite faces . how many cubelets are painted with exactly one colour ? 
Options: a ) 216 , b ) 264 , c ) 296 , d ) 312 , e ) 324
Output (English): a