import qualified Control.Arrow         as Arrow
import qualified Control.Monad         as Monad
import qualified Data.Char             as Char
import qualified Data.List             as List
import qualified Data.ByteString.Char8 as BSC8
import qualified Data.Vector.Unboxed   as VU
import qualified Data.Ord              as Ord

getI :: BSC8.ByteString -> Maybe (Int, BSC8.ByteString)
getI = fmap (Arrow.second BSC8.tail) . BSC8.readInt
getAB :: IO (Int, Int)
getAB = (\vec -> (vec VU.! 0, vec VU.! 1)) . VU.unfoldrN 2 getI <$> BSC8.getLine

main :: IO ()
main = do
  (n, k) <- getAB
  s      <- BSC8.unpack <$> BSC8.getLine
  if even (n - k)
    then solve' n k s
    else solve'' n k s

solve', solve'' :: Int -> Int -> String -> IO ()
solve' n k s
  = putStrLn $ drop (k - 1) s ++ (reverse $ take (k - 1) s)
solve'' n k s
  = putStrLn $ drop (k - 1) s ++ take (k - 1) s