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, 11).

list(usable).
x = x.
end_of_list.

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

list(passive).
A - (B - (C - (A - B))) != C.
end_of_list.