black blind book braille page paper pattern read side sightless texture wave white finger letter Scripture touch word active appetite appetite for wood destructive insect pale pest spiralling antennae termite timber transparent white-ant widespread angles appetite-for-wood blind-bugs bugs damage damaged danger dangerous destroying destruction hungry insatiable insects pests riddled surface surfaced surfaces termites textured textures thick thin voracious white-anted white-anting white-ants wood wood-damage wood-eaters woodwork arranged arrangement as-figure-six-on-a-die basic braille-alphabet braille-character-set braille-codes braille-dots braille-font braille-punctuation cell characters chart configurations enabling French-teacher grid internationally-standardised letter-substitution Louis-Braille partially-sighted patterned patterns positioned positions raised-dots six-dots tactile three-dimensional-tactile-bumps two-parallel-vertical-lines-of-three-dots Unicode vertical vision-impaired writing-system