To hint at the solution, left examples can be arranged in a sequence to show the unknot tying itself.
Adjacent-numbered pages: BP377 BP378 BP379 BP380 BP381  *  BP383 BP384 BP385 BP386 BP387
nice, math, anticomputer, help, traditional
knot [smaller | same | bigger]
Aaron David Fairbanks
https://en.wikipedia.org/wiki/Prime_knot
Adjacent-numbered pages: BP848 BP849 BP850 BP851 BP852  *  BP854 BP855 BP856 BP857 BP858
math, hardsort
Adjacent-numbered pages: BP849 BP850 BP851 BP852 BP853  *  BP855 BP856 BP857 BP858 BP859
left-finite, right-finite, left-full, right-full, finished, experimental, funny
nothing [same | bigger]zoom in left (nothing) | zoom in right (nothing)