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 Kotlin (judge verdict: Accepted)

fun main(args: Array<String>) {
    val inputString= readLine()!!
    println("%s".format(inputString.map {
        when {
            !it.isUpperCase() -> it.toUpperCase()
            else -> it.toLowerCase()
        }
    }.joinToString(separator = "")))
}