keyboard = [
  'qwertyuiop[]',
  "asdfghjkl;'\\",
  "zxcvbnm,./"
]

def gen_1(str)
  alpha = 'abcdefghijklmnopqrstuvwxyz'
  num   = '0123456789'
  i = 0
  while i<alpha.size
    j = 0
    while j<num.size
      puts "#{alpha[i]}_#{str}#{num[0..j]}_#{alpha[i]}"
      j += 1
    end
    i += 1
  end
end

def gen_2(str)
  alpha = 'abcdefghijklmnopqrstuvwxyz'
  num   = '0123456789'
  for i in 1..8 do
    j = 0
    while j<num.size
      puts "#{str}#{num[j]*i}"
      j+=1
    end
  end
end

puts '11'

for line in keyboard do
  i = 0
  while i<line.size do
    str = line[0..i]
    gen_1(str)
    gen_2(str)
    i += 1
  end
end