import Data.List
import Control.Applicative
import Control.Monad

main = do
  [t, a, b] <- map read . words <$> getLine
  if a > t || b > t
     then putStrLn "NO"
     else do
       putStrLn "YES"
       mapM_ putStrLn $ move t 0 0 a b

move 1 x y a b = [arrowL (a - x) (b - y)]
move t x y a b = case arrow (a - x) (b - y) of
  "^" -> arrow (a - x) (b - y) : move (t - 1) x (y + 1) a b
  "^>" -> arrow (a - x) (b - y) : move (t - 1) (x + 1) (y + 1) a b
  ">" -> arrow (a - x) (b - y) : move (t - 1) (x + 1) y a b
  ">v" -> arrow (a - x) (b - y) : move (t - 1) (x + 1) (y - 1) a b
  "v" -> arrow (a - x) (b - y) : move (t - 1) x (y - 1) a b
  "<v" -> arrow (a - x) (b - y) : move (t - 1) (x - 1) (y - 1) a b
  "<" -> arrow (a - x) (b - y) : move (t - 1) (x - 1) y a b
  "<^" -> arrow (a - x) (b - y) : move (t - 1) (x - 1) (y + 1) a b

arrow 1 1 = "^"
arrow 1 0 = "v"
arrow 1 (-1) = ">"
arrow 0 (-1) = "<"
arrow (-1) (-1) = "v" 
arrow (-1) 0 = "^"
arrow (-1) 1 = "<"
arrow 0 1 = ">"
arrow x y 
  | x > 1 && y > 1 = "^>"
  | x > 1 = ">"
  | y > 1 = "^"

arrowL 1 1 = "^>"
arrowL 1 0 = ">"
arrowL 1 (-1) = ">v"
arrowL 0 (-1) = "v"
arrowL (-1) (-1) = "<v" 
arrowL (-1) 0 = "<"
arrowL (-1) 1 = "<^"
arrowL 0 1 = "^"