strs = gets.to_s.chomp.split("")
e = strs.count("E")
n = strs.count("N")
s = strs.count("S")
w = strs.count("W")
result =  [] 
we = w - e 
sn = s - n 
if we > 0
  result.push we
elsif we < 0
  result.push we.abs
end
if sn > 0
  result.push sn
elsif sn < 0
  result.push sn.abs
end
p 0 if result.empty?
p Math.hypot(result[0], result[1] ||= 0) unless result.empty?