op(400, xfx, /).  % infix operator

clear(print_kept).
clear(print_new_demod).
clear(print_back_demod).

assign(pick_given_ratio, 4).
assign(max_mem, 20000).

set(knuth_bendix).

set(hyper_res).
set(order_history).
set(unit_deletion).
set(para_from_units_only).
set(para_into_units_only).

assign(max_weight, 18).
  
list(usable).
x = x.
end_of_list.

list(sos).
x / y != z / u  |  y / (((z / z) / z) / ((x / x) / x)) = u.

x / x = e.

(A / ((((A / A) / B) / C) / (((A / A) / A) / C))) != B.
end_of_list.

list(passive).
end_of_list.