while gets
  puts case $_.to_f
  when 0...48
    "light fly"
  when 48...51
    "fly"
  when 51...54
    "bantam"
  when 54...57
    "feather"
  when 57...60
    "light"
  when 60...64
    "light welter"
  when 64...69
    "welter"
  when 69...75
    "light middle"
  when 75...81
    "middle"
  when 81...91
    "light heavy"
  else
    "heavy"
  end
end