Sentence 1: Pencil making starts with wood being carved into thin slats. 
 Sentence 3: The extruded writing cores are cut to length and put in place 
 Sentence 4:  The other halves of the slats are then squeezed on top 
 Sentence 5:  Finally, the individual pencils are carved into shape 
 Given Sentence 2: Grooves are cut into the slats to make space for the graphite cores.