interpretation(18, [
    function(c(_), [1,0,3,2,5,4,7,6,9,8,11,10,13,12,15,14,17,16]),
    function(^(_,_), [
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,17,
         0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 3, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 4, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 5, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 6, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 7, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 8, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 9, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0,
         0,10, 0, 0, 0, 0, 0, 0, 0, 0,10, 0, 0, 0, 0, 0, 0, 0,
         0,11, 0, 0, 0, 0, 0, 0, 0, 0, 0,11, 0, 0, 0, 0, 0, 0,
         0,12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,12, 0, 0, 0, 0, 0,
         0,13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,13, 0, 0, 0, 0,
         0,14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,14, 0, 0, 0,
         0,15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,15, 0, 0,
         0,16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,16, 0,
         0,17, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,17]),
    function(v(_,_), [
         0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,17,
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         3, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         4, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         5, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         6, 1, 1, 1, 1, 1, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         7, 1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         8, 1, 1, 1, 1, 1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         9, 1, 1, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 1,
        10, 1, 1, 1, 1, 1, 1, 1, 1, 1,10, 1, 1, 1, 1, 1, 1, 1,
        11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,11, 1, 1, 1, 1, 1, 1,
        12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,12, 1, 1, 1, 1, 1,
        13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,13, 1, 1, 1, 1,
        14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,14, 1, 1, 1,
        15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,15, 1, 1,
        16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,16, 1,
        17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,17]),
    function(f(_,_), [
         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 0, 3, 2, 5, 4, 7, 6, 9, 8,11,10,13,12,15,14,17,16,
         1, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 5, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 4, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 7, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 6, 1, 1, 1, 1, 1, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 9, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1,
         1, 8, 1, 1, 1, 1, 1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1,
         1,11, 1, 1, 1, 1, 1, 1, 1, 1,11, 1, 1, 1, 1, 1, 1, 1,
         1,10, 1, 1, 1, 1, 1, 1, 1, 1, 1,10, 1, 1, 1, 1, 1, 1,
         1,13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,13, 1, 1, 1, 1, 1,
         1,12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,12, 1, 1, 1, 1,
         1,15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,15, 1, 1, 1,
         1,14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,14, 1, 1,
         1,17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,17, 1,
         1,16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,16])]).
% isofilter: input=1, kept=1, checks=0, perms=0, 0.01 seconds.