directions = File.open(ARGV[0], &:readlines).map(&:chomp)
n = directions.shift.to_i
x1 = 0
y1 = 0
x2 = 0
y2 = 0
n.times do |i|
  case directions[i]
  when 'north' then y1 -= 1; y2 += 1
  when 'northeast' then x1 += 1; y1 -= 1; x2 -=1; y2 += 1
  when 'east' then x1 += 1; x2 -= 1
  when 'southeast' then x1 += 1; y1 += 1; x2 -= 1; y2 -= 1
  when 'south' then y1 += 1; y2 -= 1
  when 'southwest' then x1 -= 1; y1 += 1; x2 += 1; y2 -= 1
  when 'west' then x1 -= 1; x2 += 1
  when 'northwest' then x1 -= 1; y1 -= 1; x2 += 1; y2 += 1
  end
end

x = (x2 - x1).abs
y = (y2 - y1).abs
z = Math.sqrt(x**2 + y**2).round

puts(((z % 26) + 'a'.ord).chr)