(VAR x y z )
(RULES 
        and(x, or(y, z)) -> or(and(x, y), and(x, z))
        and(x, and(y, y)) -> and(x, y)
        or(or(x, y), and(y, z)) -> or(x, y)
        or(x, and(x, y)) -> x
        or(true, y) -> true
        or(x, false) -> x
        or(x, x) -> x
        or(x, or(y, y)) -> or(x, y)
        and(x, true) -> x
        and(false, y) -> false
        and(x, x) -> x
        
)