interpretation(2, [
    function(c(_), [1,0]),
    function(^(_,_), [0,0,0,1]),
    function(v(_,_), [0,1,1,1]),
    function(f(_,_), [1,1,1,0]),
    function(m(_,_), [0,0,0,1]),
    function(j(_,_), [0,1,1,1])]).
% isofilter: input=1, kept=1, checks=0, perms=0, 0.00 seconds.