import Foundation

let location:[String] = readLine()!.map{String($0)}
var horizontal:Int = 0
var vertical:Int = 0
for i in 0..<location.count {
    let direction:String = location[i]
    switch direction {
    case "N":
        vertical += 1
    case "E":
        horizontal += 1
    case "W":
        horizontal -= 1
    case "S":
        vertical -= 1
    default:
        horizontal += 0
        vertical += 0
    }
}
let distance:Double = sqrt(pow(Double(horizontal), 2.0) + pow(Double(vertical), 2.0));
print(distance)