# 東 => 西 => 南 => 北
hougaku = %w(E S W N).zip((1..4)).to_h
# => {"E"=>1, "S"=>2, "W"=>3, "N"=>4}

A = gets.chomp
B = gets.chomp
p ((hougaku[B] + 4) - hougaku[A]) % 4