chars = gets.chomp.gsub("-","").chars

m = false
i = false
n = false

count = 0

chars.length.times do |j|
    if chars[j] == "m"
        m = true
    elsif chars[j] == "i" and m
        i = true
    elsif chars[j] == "n" and (chars[j + 1] == "m" or chars[j + 1].nil?) and m and i
        n = true
    else
      m = false
      i = false
      n = false
    end

    if m and i and n
      count += 1
      m = false
      i = false
      n = false
    end
end

puts count