fun main(args: Array<String>) {
	val S = readLine()!!
	var ans = ""

	S.forEachIndexed { i, c ->
		val a = 'A'.toInt()
		val b = ('A' .. 'Z').toList().size
		val t = ((c.toInt() - i - 1) % b + a) % b + a
		ans += t.toChar()
	}
	println(ans)
}