import Control.Monad

rInt :: String -> Int
rInt = read

rcTuple [rc,x] = (rc, rInt x)

solve _ _ [] x y
    | ((x + y) `mod` 2) == 0    = "white"
    | otherwise                 = "black"
solve w h (rc:rcs) x y
    | updateX   = solve w h rcs x' y
    | updateY   = solve w h rcs x y'
    | otherwise = solve w h rcs x y
    where
        updateX = (fst rc) == "R" && (snd rc) == y
        updateY = (fst rc) == "C" && (snd rc) == x
        x'  | (x - 1) < 0   = w - 1
            | otherwise     = x - 1
        y'  | (y - 1) < 0   = h - 1
            | otherwise     = y - 1

main = do
    [h, w] <- map rInt . words <$> getLine
    n <- readLn
    rc <- map (rcTuple . words) <$> replicateM n getLine
    putStrLn $ solve w h rc 0 0