533 B | 533 chars
import sys
from math import sqrt, pi, sin, factorial
BLANK = " "
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n, k = mii()
s = input()
start = n // 4
e = start + n // 2
for _ in range(k % 3):
s = s[:start] + s[e:] + s[start:e]
p(s)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()