file = File.read("schrauben.txt")
for i in 1..60
  s = file.scan(/s\s(#{i})$/).size
  m = file.scan(/m\s(#{i})$/).size
  if (s!=0 and m!=0) then
    a = [s,m]
    n = a.min
    puts "#{i}mm: #{n} passende Paare"
  end
end