function isSide(side)
  tSides = rs.getSide() -- this is a call the the redstone api which returns an array of the sides
end

for i = 1, #tSides do
      if not needAName( i ) and tSide[i] == side then
        return true
end

  return false
end

one = string.lower( read() )

if isSide(one) then
  print("Correct!)
else
  print(one.." is not a side")
end