(VAR x y )
(STRATEGY INNERMOST)
(RULES 
        f_0(x) -> a
        f_1(x) -> g_1(x,x)
        g_1(s(x),y) -> b(f_0(y),g_1(x,y))
        f_2(x) -> g_2(x,x)
        g_2(s(x),y) -> b(f_1(y),g_2(x,y))
        f_3(x) -> g_3(x,x)
        g_3(s(x),y) -> b(f_2(y),g_3(x,y))
        f_4(x) -> g_4(x,x)
        g_4(s(x),y) -> b(f_3(y),g_4(x,y))
        f_5(x) -> g_5(x,x)
        g_5(s(x),y) -> b(f_4(y),g_5(x,y))
        
)