a = gets.chomp.to_sym
b = gets.chomp.to_sym
hougaku = { E: 1, W: 2, S: 3, N: 4 }

puts (hougaku[b] - hougaku[a]).negative? ? hougaku.length - hougaku[a] + hougaku[b] : hougaku[b] - hougaku[a]