# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N, K = getlist()
	S = input()
	if (N - K + 1) % 2 == 0:
		ans = S[K - 1:] + S[:K - 1]

	else:
		ans = S[K- 1:] + S[:K - 1][::-1]

	print(ans)




if __name__ == '__main__':
	main()