-- yukicoder My Practice
-- author: Leonardone @ NEETSDKASU

main = putStrLn . take 5 . concat . map (reverse . (':' :) . take 2 . reverse . ('0' :) . show) . reverse . (uncurry (flip (:) . return)) . (`divMod` 60) . ((+) 600) . (`div` 10) . (* 6) =<< readLn