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MONESSEN, Pa. — Parents in a Pennsylvania school district are turning 50 shades of red over word search puzzles given to their middle school students.

The students were given puzzles based on the erotic novel and movieFifty Shades of Grey” reportedly from a school employee.

The puzzles contained terms including “spanking,” ”submissive,” ”leather cuffs” and “bondage.”

Officials in the Monessen School District say they can’t say who passed out the puzzles or how many students received one because they just learned about it.

The issue became public when parents complained at Tuesday night’s school board meeting.

Superintendent Leanne Spazak said the incident was under investigation.

Parent James Carter says he tried to question the school’s principal and dean of students about the puzzle his son received, but they refused when he insisted on recording their conversation.