func main()
	var ss: [][]char :: cui@input().split(" ")
	var n: int :: ss[0].toInt(&)
	var k: int :: ss[1].toInt(&)
	var s: []char :: cui@input()
	var ans: []char :: s.sub(k - 1, n - k + 1)
	do s :: s.sub(0, k - 1)
	if((n - k) % 2 = 0)
		do s.reverse()
	end if
	do ans :~ s
	do cui@print("\{ans}\n")
end func