interpretation(4, [
    function(c(_), [1,0,3,2]),
    function(^(_,_), [0,0,0,0,0,1,2,3,0,2,2,0,0,3,0,3]),
    function(v(_,_), [0,1,2,3,1,1,1,1,2,1,2,1,3,1,1,3]),
    function(f(_,_), [1,1,1,1,1,0,3,2,1,3,3,1,1,2,1,2]),
    function(m(_,_), [0,0,0,0,0,1,2,3,0,2,2,0,0,3,0,3]),
    function(j(_,_), [0,1,2,3,1,1,1,1,2,1,2,1,3,1,1,3])]).
% isofilter: input=1, kept=1, checks=0, perms=0, 0.01 seconds.