Why is Puckman called Pac-Man

For the North American market, the name was changed from Puck Man to Pac-Man, as it was thought that vandals would be likely to change the P in "puck" to an F, forming a common expletive.[31] Puck Man machines can be found throughout Europe.
When Midway released Pac-Man in the United States, the company also redesigned the cabinet's artwork, as the Namco-style artwork was more costly to mass-produce. Puck Man was painted overall white featuring multicolored artwork on both sides with cheerful Pac-Man characters in different poses while Pac-Man was painted yellow, with simple artwork on both sides front and back.