- PORTRAIT 1
(a->a, b->a, c->b, d->b)
{} critical. 0, 0, 1, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 2
(a->c, b->c, c->a, d->a)
{} critical. 0, 1, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 3
(a->a, b->a, c->c, d->c)
{} critical. 0, 1, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 4
(a->c, b->c, c->d, d->a)
{c} critical. 0, 1, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 5
(a->a, b->a, c->d, d->c)
{c} critical. 0, 1, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 6
(a->a, b->a, c->b, d->c)
{c} critical. 0, 0, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 7
(a->c, b->c, c->a, d->b)
{c} critical. 0, 0, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 8
(a->a, b->a, c->b, d->d)
{d} critical. 0, 0, 1, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 9
(a->a, b->a, c->b, d->c)
{d} critical. 0, 0, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 10
(a->c, b->c, c->a, d->d)
{d} critical. 0, 1, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 11
(a->c, b->c, c->a, d->b)
{d} critical. 0, 0, 0, 1 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 12
(a->c, b->c, c->d, d->a)
{d} critical. 0, 1, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 13
(a->b, b->c, c->d, d->a)
{ab} critical. 0, 0, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 14
(a->b, b->a, c->d, d->c)
{ac} critical. 0, 0, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 15
(a->b, b->c, c->d, d->a)
{ac} critical. 0, 0, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d - PORTRAIT 16
(a->b, b->c, c->a, d->d)
{ad} critical. 0, 0, 0, 0 number of nonpostcritical, critical preimages for a, b, c, d