n = gets.chomp.to_i
arr = []
(0...n).each do
  arr.push gets.chomp
end

class Symbol
  def call(*a,&b)
    proc {|m| m.send(self, *a, &b) }
  end
end

arr.map!(&:split.(''))

g_memo = {}
p_memo = {}
arr.each_with_index do |line, i|
  g_memo[i] = {}
  p_memo[i] = {}

  line.each_with_index do |c, j|
    break if line.length - 4 < j
    r = []
    r.push line[j  ] == 'g'
    r.push line[j+1] == 'o'
    r.push line[j+2] == 'o'
    r.push line[j+3] == 'd'
    g_memo[i][j] = {memo: r, start: j}
  end

  line.each_with_index do |c, j|
    break if line.length - 7 < j
    r = []
    r.push line[j  ] == 'p'
    r.push line[j+1] == 'r'
    r.push line[j+2] == 'o'
    r.push line[j+3] == 'b'
    r.push line[j+4] == 'l'
    r.push line[j+5] == 'e'
    r.push line[j+6] == 'm'
    p_memo[i][j] = {memo: r, start: j}
  end

  min = 99999999
  g_memo[i].each do |gkv|
    gc = 4 - gkv[1][:memo].count(true)
    ge = gkv[1][:start] + 3
    p_memo[i].each do |pkv|
      pc = 7 - pkv[1][:memo].count(true)
      pi = pkv[1][:start]
      if (ge < pi) && (min > gc + pc)
        min = gc + pc
      end
    end
  end
  puts min
end