solutions to "Internationalization Puzzles" (https://i18n-puzzles.com) in
ip.goal written in the k dialect goal (https://codeberg.org/anaseto/goal)

extensions to goal in goal.diff                                        puzzle(s)
 cmd/goal/full.go  bcr[S]   bcrypt hash S with default cost
                   bcr[i;S] bcrypt hash S with cost i
                   bcr[s;S] compare hash s with passwords S            10
                   nfc[S]   nfc normalize S                            10
                   swl[s;S] sort S with locale s                       12
data in folder d
 [ivx]+.t[sx]t (test) input                                            *
 xvi.s.t[sx]t solved state of the game                                 16
 https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT   16
 https://www.unicode.org/Public/UNIDATA/UnicodeData.txt                8,10
 https://www.unicode.org/Public/MAPPINGS/ISO8859/8859-1.TXT            13
 20(18[cg]|21b|23d) folders with resp. versions of time zone db        19

notes
- UnicodeData.txt fields: https://en.wikipedia.org/wiki/Unicode_character_property
- puzzle 13 line 40: removing 00 bytes with `0 1^` (shorter than `(,0)^`) converts
  from utf16 to iso8859-1 assuming only characters from the latter, which exactly
  contains the first 256 unicode points: `~/"i"$2#+!rx/^#/^=-read"8859-1.TXT"`
  converting to utf8 with `(x;195,x-64)x>222` works assuming only lower case
- puzzle 16: no general solution; play game "by hand" then count rotations
- puzzle 17: dictionary `m` contains the number of bytes missing (0-3) by the
  number of leading 1s in the byte representation of the list of trailing bytes
  the height of puzzle pieces is divisible by 4 which allows to represent the
  tabs and slots by decoding base 4 (line 60)
  the solution (putting in the pieces one by one) still feels too complicated
- puzzle 19: tz db files for the different versions compiled in d folder with:
    for v in 2018c 2018g 2021b 2023d; do
      curl -O https://data.iana.org/time-zones/releases/tzdata$v.tar.gz
      mkdir tzdata$v
      tar -xvz -C tzdata$v -f tzdata$v.tar.gz
      cd tzdata$v
      ls | awk -F. "NF==1 && /^[ac-u].*[^s]$/" | xargs -I % zic -d ../$v %
      cd ..
      rm -r tzdata$v*
    done
- puzzle 20: The last (couple of) decorative character(s) are still not decoded
  correctly; doesn't affect receiving the solution