ly assume that any hex value less than $0$x$110000$ is a legitimate Unicode codepoint $($though it's likely not to be implemented since much of Unicode's space is still unpopulated or reserved for private implementations$).$ The less good news is that I would like your code to parse somewhat more sophisticated files than previous efforts. The rationale is that going back from Unicode hex values to UTF$-8$ encodings gives us a perfect time to annotate what we are doing, and annotation of course is more syntactically complex than just byte$($s$)-$for$-$byte$($s$)$ translation.

So here are the requirements for this line$-$by$-$line parsing:

$1)$ Comments are indicated by a $"$#$"$; everything after a $"$#$"$ is ignored.

$2)$ Lines are separated in Unix fashion, with a newline character $0$xa$.$

$3)$ Tokens in a line are separated by whitespace in the form of spaces and$/$or tabs$.$

$4)$ The only token that is parsed and output is the $*$last$*$ token. The others are treated as comments and are ignored.

$5)$ The last token should be a hex value; it can $($but does not require$)$ use $"$U$+"$ or $"0$x$"$ to begin it$.$