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)

/**
  * http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ITP1_8_A&lang=jp
  * Character - Toggling Cases
  */
object Main {
  def main(args: Array[String]): Unit = {
    println(io.StdIn.readLine().map {
      case c if c.isUpper => c.toLower
      case c if c.isLower => c.toUpper
      case c => c
    })
  }
}