(VAR x y z )
(STRATEGY INNERMOST)
(RULES 
        le(0,y,z) -> greater(y,z)
        le(s(x),0,z) -> false
        le(s(x),s(y),0) -> false
        le(s(x),s(y),s(z)) -> le(x,y,z)
        greater(x,0) -> first
        greater(0,s(y)) -> second
        greater(s(x),s(y)) -> greater(x,y)
        double(0) -> 0
        double(s(x)) -> s(s(double(x)))
        triple(x) -> if(le(x,x,double(x)),x,0,0)
        if(false,x,y,z) -> true
        if(first,x,y,z) -> if(le(s(x),y,s(z)),s(x),y,s(z))
        if(second,x,y,z) -> if(le(s(x),s(y),z),s(x),s(y),z)
        
)