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A version that returns the English names of the input 1-2 digit number.

Update: Hmmm. I just noticed on the stackoverflow page that they clarified that the numbers should be spelled out in both the left AND right columns. Phooey.

Another update: And now there's some further stipulation that there be a separator(space, hyphen, whatever) between spelled words and the input number must come in through STDIN, not as a passed parameter, so no pop @ARGV.

Update: 283

```@p=(Thir,Four,Fif,Six,Seven,Eigh,Nine);@n=("\x8",One,Two,Three,Four,Fi
+ve,@p[3..6],Ten,Eleven,Twelve,map\$_.teen,@p);s/u//for@m=map\$_.ty,Twen
+,@p;\$n[8].=t;sub n{\$n=shift;\$n?\$n<20?\$n[\$n]:"\$m[\$n/10-2]-\$n[\$n%10]":Z
+ero}\$p+=<>;warn\$m=n(\$p)," is ",\$_=\$p-4?n\$p=()=\$m=~/\w/g:magic,".\n"un
+til/c/
```0
Zero is Four.
Four is magic.

40
Forty is Five.
Five is Four.
Four is magic.

67
Sixty-Seven is Ten.
Ten is Three.
Three is Five.
Five is Four.
Four is magic.

83
Eighty-Three is Eleven.
Eleven is Six.
Six is Three.
Three is Five.
Five is Four.
Four is magic.

```

##### Versions that don't spell out right column. #####

Update:Sigh. Apparently I'm blind. Using duelafns suggestion, modifying the end conditional and some other minor tweaks.

256

```@p=(Thir,Four,Fif,Six,Seven,Eigh,Nine);@n=("",One,Two,Three,Four,Five,
+@p[3..6],Ten,Eleven,Twelve,map(\$_.teen,@p),map\$_.ty,Twen,@p);\$n[22]=~
+s/u//;\$n[8].=t;\$_+=<>;print\$z=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:
+Zero," is ",\$_=\$_-4?length\$z:magic,".\n"until/a/

or

```perl -E'@p=(Thir,Four,Fif,Six,Seven,Eigh,Nine);@n=("",One,Two,Three,Fo
+ur,Five,@p[3..6],Ten,Eleven,Twelve,map(\$_.teen,@p),map\$_.ty,Twen,@p);
+\$n[22]=~s/u//;\$n[8].=t;\$_+=<>;say\$z=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$
+_%10]:Zero," is ",\$_=\$_-4?length\$z:magic,"."until/a/'

Previous versions

Update: 314 Reformatted a bit to make it easier to run as a one liner. Capitalized names... because I could. Knocked another 2 strokes off. It bothers me that I can't figure out how to get rid of the duplicated Four without making it longer. I guess Four IS magic...

```@u="0335443554366887798866555766"=~/./g;sub n{@p=(Thir,Four,Fif,Six,Se
+ven,Eigh,Nine);@n=("",One,Two,Three,Four,Five,@p[3..6],Ten,Eleven,Twe
+lve,map(\$_.teen,@p),map\$_.ty,Twen,@p);\$n[22]=~s/u//;\$n[8].=t;shift()?
+\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:Zero}\$_=pop;print\$z=n(\$_)," is ",
+\$_=\$_-4?length\$z:magic,".\n"while/\d/

Update: 316

```@u='0335443554366887798866555766'=~/./g;sub n{@p=(thir,four,fif,six,se
+ven,eigh,nine);@n=('',one,two,three,four,five,@p[3..6],ten,eleven,twe
+lve,map(\$_.teen,@p),twenty,map\$_.ty,@p);\$n[22]=~s/u//;\$n[8].=t;shift(
+)?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:zero}\$_=pop;print\$z=n(\$_)," is
+",\$_=\$_-4?length\$z:magic,".\n"while/\d/

Update: 337

```@u='0335443554366887798866555766'=~/./g;sub n{@p=(qw/thir four fif six
+ seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],qw/ten
+ eleven twelve/,map(\$_.'teen',@p),'twenty',map\$_.'ty',@p);\$n[22]=~s/u
+//;\$n[8].='t';shift()?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:'zero'}\$_=<
+>;print\$z=n(\$_)," is ",\$_=\$_-4?length\$z:magic,".\n"while/\d/

Update: 341

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/,map(\$_.'teen',@p),'twenty',map\$_.'ty',@p);\$n[22
+]=~s/u//;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:'zero'}
+\$_=<>;print\$z=n(\$_)," is ",\$_=\$_-4?length\$z:magic,".\n"while/\d/

Update: 343

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/,map(\$_.'teen',@p),'twenty',map\$_.'ty',@p);\$n[22
+]=~s/u//;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:'zero'}
+\$_=<>;print n(\$_)," is ",\$_=\$_-4?length n(\$_):magic,".\n"while/\d/

Update: 344

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/,map(\$_.'teen',@p),'twenty',map\$_.'ty',@p);\$n[22
+]=~s/u//;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:'zero'}
+\$_=pop;print n(\$_)," is ",\$_=\$_-4?length n(\$_):magic,".\n"while/\d/

Update: 345

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/,map(\$_.'teen',@p),'twenty',map(\$_.'ty',@p);\$n[2
+2]=~s/u//;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].\$n[\$_%10]:'zero'
+}\$_=pop;print n(\$_)," is ",\$_=\$_-4?length n(\$_):magic,".\n"while/\d/

Update: 361

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/);push@n,\$_.'teen'for@p;\$p[1]=~s/u//;push@n,'twe
+nty',;push@n,\$_.'ty'for@p;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].
+\$n[\$_%10]:'zero'}\$_=pop;print n(\$_)," is ",\$_=\$_-4?length n(\$_):magic
+,".\n"while/\d/

Update: Save a stroke: 383.

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/);push@n,\$_.'teen'for@p;\$p[1]=~s/u//;push@n,'twe
+nty',;push@n,\$_.'ty'for@p;\$n[8].='t';\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18].
+\$n[\$_%10]:'zero'}\$_=pop;print n(\$_)," is ",\$_=\$_-4?\$_<20?\$u[\$_]||4:\$u
+[chop]+\$u[18+\$_]:magic,".\n"while/\d/

Proof of concept. Should be lots of room for improvement.

Update: whoops. Fixed for fourteen/forty. Curse you, irregular number names!

384 strokes.

```@u='0335443554366887798866555766'=~/./g;sub n{shift;@p=(qw/thir four f
+if six seven eigh nine/);@n=('',qw/one two three four five/,@p[3..6],
+qw/ten eleven twelve/);push@n,\$_.'teen'for@p;push@n,'twenty',;push@n,
+\$_.'ty'for@p;\$n[8].='t';\$n[22]=~s/u//;\$t=\$_?\$_<20?\$n[\$_]:\$n[\$_/10+18]
+.\$n[\$_%10]:'zero'}\$_=pop;print n(\$_)," is ",\$_=\$_-4?\$_<20?\$u[\$_]||4:\$
+u[chop]+\$u[18+\$_]:magic,".\n"while/\d/
```C:\test>magic.pl 0
zero is 4.
four is magic.

C:\test>magic.pl 1
one is 3.
three is 5.
five is 4.
four is magic.

C:\test>magic.pl 14
fourteen is 8.
eight is 5.
five is 4.
four is magic.

C:\test>magic.pl 15
fifteen is 7.
seven is 5.
five is 4.
four is magic.

C:\test>magic.pl 18
eighteen is 8.
eight is 5.
five is 4.
four is magic.

C:\test>magic.pl 44
fortyfour is 9.
nine is 4.
four is magic.

C:\test>magic.pl 77
seventyseven is 12.
twelve is 6.
six is 3.
three is 5.
five is 4.
four is magic.

C:\test>magic.pl 80
eighty is 6.
six is 3.
three is 5.
five is 4.
four is magic.

C:\test>magic.pl 99
ninetynine is 10.
ten is 3.
three is 5.
five is 4.
four is magic.
```

In reply to Re: Code Golf: Four is magic by thundergnat
in thread Code Golf: Four is magic by deMize

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