import math

let
  s = readLine stdin
var
  x, y = 0

for c in s:
  case c
  of 'N':
    inc y
    
  of 'S':
    dec y
    
  of 'E':
    inc x
    
  of 'W':
    dec x
    
  else:
    discard

echo sqrt toFloat x ^ 2 + y ^ 2