Shaolin Challenges Ninja

Just wondering what came first, was it Drunken Master or Shaolin Challenges Ninja (Heroes of the East)

I first saw the drunken boxing style in Shaolin Challenges Ninja with Liu Chia-liang as the drunk teaching Gordon Liu in a scene and it prompted me to buy Drunken Master some years later because that was one of the highlights for me.

Both say they were released in 1978 but I'm just curious.