Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in Scala (judge verdict: Wrong Answer)

import java.util.Scanner
import java.lang.Character.isLowerCase

object Main {

  def main(args: Array[String]) = {
    val sc = new Scanner(System.in)
    val str = sc.next().map { x =>
      if (isLowerCase(x)) {
        x.toUpper
      } else {
        x.toLower
      }
    }
    println(str)
  }
}