import sys
readline=sys.stdin.readline
write=sys.stdout.write
from math import gcd as GCD
import math

def main(N,K):
    lst=[i for i in range(N)]
    for i in range(N-K+1):
        lst[i:i+K]=lst[i:i+K][::-1]
    return lst
N,K=map(int,readline().split())
S=readline().rstrip()
if (N-K)%2:
    ans=S[K-1:]+S[:K-1]
else:
    ans=S[K-1:]+S[:K-1][::-1]
print(ans)