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: Accepted)

import scala.io.StdIn.readLine

object Main {
  def main(args: Array[String]) {
    val input = readLine()
    val ans = input.map(char => if (char.isLower) char.toUpper else char.toLower)
    println(ans)
  }
}