let i = require('fs').readFileSync('/dev/stdin', 'utf8').split('\n')[0]
let x = y = 0
Array.prototype.forEach.call(i, (e) => {
  if (e === 'N') y++
  else if (e === 'E') x++
  else if (e === 'W') x--
  else y--
})
console.log(Math.sqrt(x * x + y * y))