# Language Name, N bytes

# Ruby, <s>104</s> <s>101</s> 96 bytes

sm@+drd1zG

implicit: z = input string
 m       G   map each letter (variable d) of the alphabet to:
   +drd1        d + upper(d)
  @     z       filter z for these two letters
s            sum, join to a string

niveaugourou 0
s=ENTRETONTEXTE()
§2 a=LeCaracNumero()&s *(1)
n=*(1)
costaud i=*(2)/&i infeg NombreDeLettres(&s)/i=+*(1)
b=LeCaracNumero()&s &i
c=&b
d=&a
GOTONULPOURLESNULS %4 }&b sup *(96){
c=-*(32)
§4 GOTONULPOURLESNULS %5 }&a sup *(96){
d=-*(32)
§5 GOTONULPOURLESNULS %1 }&c inf &d{
a=&b
n=&i
§1 faiblard
GOTOPRINTDUTEXTE()&a
s=Marijuana()}BOITEAPINGOUINS()}PrendsUnMorceau()&s *(0) &n{ }PrendsUnMorceau()&s }&n+*(1){ *(0){{ «»
GOTONONNULPOURLESNULS %3 }NombreDeLettres(&s) eg *(1){
GOTOPASMALIN %2
§3 GOTOPRINTDUTEXTE()&s

niveaugourou 0                                          GOTO Allow every keyword to be used
s=ENTRETONTEXTE()                                       GOTO Read from STDIN
§2 a=LeCaracNumero()&s *(1)                             GOTO Get first char in s
n=*(1)
costaud i=*(2)/&i infeg NombreDeLettres(&s)/i=+*(1)     GOTO Loop on every char of s
b=LeCaracNumero()&s &i                                  GOTO b = i-th char
c=&b
d=&a
GOTONULPOURLESNULS %4 }&b sup *(96){                    GOTO If b is uppercase, goto §4
c=-*(32)                                                GOTO Get the uppercase ASCII value of b
§4 GOTONULPOURLESNULS %5 }&a sup *(96){                 GOTO same as above but with a
d=-*(32)
§5 GOTONULPOURLESNULS %1 }&c inf &d{                    GOTO If b is after a in alphabetical order, goto §1 (next loop iteration)
a=&b                                                    GOTO Else replace a by b
n=&i
§1 faiblard                                             GOTO End loop
GOTOPRINTDUTEXTE()&a                                    GOTO Print the value of a
t=PrendsUnMorceau()&s *(0) &n                           GOTO Get the part of s before a
u=PrendsUnMorceau()&s }&n+*(1){ *(0)                    GOTO Get the part of s after a
e=BOITEAPINGOUINS()&t &u                                GOTO Create an array of penguins containing the two substrings
s=Marijuana()&e «»                                      GOTO Concatenate the penguins in the array
GOTONONNULPOURLESNULS %3 }NombreDeLettres(&s) eg *(1){  GOTO If s is one char long, goto §3
GOTOPASMALIN %2                                         GOTO Else goto §2
§3 GOTOPRINTDUTEXTE()&s                                 GOTO Print the last char

s*V/LzJ.irG1GJ

r=[];t=[];a=s.split('').map(function(x){t[i=parseInt(x,36)]?t[i].push(x):t[i]=[x];return i;});while(l=a.length)r[l-1]=t[a.splice(a.indexOf(Math.max.apply({},a)),1)].pop();console.log(r.join(''))

l=[0]*123
for e in raw_input():l[ord(e)]+=1
print''.join(chr(j)*l[j]for i in range(26)for j in(i+65,i+97))

<< HelloWorldhi
>> deHhillloorW

<?php
for($i=65;$i<123;$i++){$v[$i]=chr($i);}foreach(str_split($argv[1])as$c){$a=array_search($c,$v);if($a<97){$p[]=($a+32);$z[]=$a;}else{$p[]=$a;}}foreach($p as$chr){$m=min($p);if($z[0]+32==$m){echo chr($m-32);unset($z[0]);}else{echo chr($m);}unset($p[array_search($m,$p)]);}

<?php
$input = $argv[1];
$valueArray = [];
for($i=65;$i<123;$i++) {
    $valueArray[$i] = chr($i);
}
$new = str_split($input);
foreach($new as $char) {
    if(array_search($char, $valueArray)<97) {
        $newArray[] = (array_search($char, $valueArray)+32);
        $checkArray[] = array_search($char, $valueArray);
    } else {
        $newArray[] = array_search($char, $valueArray);
    }
}
foreach($newArray as $chr) {
    if($checkArray[0]+32 == min($newArray)) {
        $string .= chr(min($newArray)-32);
        unset($checkArray[0]);
    } else {
        $string .= chr(min($newArray));
    }
    $key = array_search(min($newArray), $newArray);
    unset($newArray[$key]);
}

echo $string;

import Data.Char
f y=[c|x<-[' '..],c<-y,toLower c==x]

[ |x<-[' '..]                  ]  -- for every x from Space to the last Unicode character
             ,c<-y                -- loop through all character c from the input string
 c                ,toLower c==x   -- and keep those where the lowercase version equals x

z=['']*42
for c in input():z[ord(c)&31]+=c
print(*z,sep='')

from itertools import*;print(*min(permutations(input()),key=lambda z:str(z).lower()),sep='')

i=input();i,x=map(list,(i,i.lower()))
while x:q=min(x);x.remove(q);q=[q.upper(),q][q in i];i.remove(q);print(q,end="")

$a=[char[]]($args[0]);For($u=1;$u-lt$a.Count;$u++){$n=$a[$u];$l=$u;while(($l-gt0)-and((""+$a[$l-1]).CompareTo(""+$n)-gt0)){$a[$l]=$a[$l-1];$l--}$a[$l]=$n};$a-join''

PS C:scripts> .sign-word-2.ps1 tTHhis
hHistT

$a=[char[]]($args[0])               # Takes command-line argument, recasts as char array
For($u=1;$u-lt$a.Count;$u++){       # Performs a quick-n-dirty insertion sort
  $n=$a[$u]
  $l=$u
  while(($l-gt0)-and((""+$a[$l-1]).CompareTo(""+$n)-gt0)){
  # Ugly, ugly code here. String.CompareTo(String) is case-insensitive, but
  # because we cast as a char[], Char.CompareTo(Char) is case-sensitive ...
  # So, need to do an on-the-fly re-casting as a string with ""+
    $a[$l]=$a[$l-1]
    $l--
  }
  $a[$l]=$n
}
$a-join''             # Without the -join'', it would print out the chars with a space between

f=s->s>""?(k=indmax([s...]%32);f(s[k+1:end]s[1:k-1])s[k:k]):s

x->(f=s->s>""?(k=indmax([s...]%32);f(s[k+1:end]s[1:k-1])s[k:k]):s;print(f(x)))

s->(for m=2:endof(s),n=m:-1:2 s[n]%32<s[n-1]%32&&(s=s[[1:n-2,n,n-1,n+1:end]])end;s)

s->(k=1;while length(k)>0 k=find(diff([s...]%32).<0);s=s[setdiff(1:end,k)]s[k]end;s)

00000000  b3 82 89 da 8b 07 80 fc  0d 74 12 b9 20 20 09 c1  |.........t..  ..|
00000010  38 e9 7e 06 86 c4 89 07  31 d2 43 eb e7 85 d2 74  |8.~.....1.C....t|
00000020  df c6 47 01 24 b4 09 cd  21 c3                    |..G.$...!.|
0000002a

org 100h

section .text

start:
    ; bubble sort - external loop
ext:
    ; start from the first character (assume bh=0, true on every DOS)
    mov bl,82h
    ; "not-swapped" flag - 82h => no swaps in current iteration;
    ; 0 => a swap happened (the 82h will come in handy later)
    mov dx,bx
    ; bubble sort - internal loop
int:
    ; read 2 characters at time in the full ax
    mov ax,word[bx]   ; al     ah
                      ; ^[bx]  ^[bx+1]
    ; check if we are at the end (the command line is CR terminated)
    cmp ah,0dh
    je skip
    ; make uppercase in cx
    mov cx,2020h
    or cx,ax
    ; compare
    cmp cl,ch
    jle next
    ; wrong order - swap and rewrite
    xchg al,ah
    mov word[bx],ax
    ; mark that we did a swap
    xor dx,dx
next:
    ; next character
    inc bx
    jmp int
skip:
    ; loop as far as we swapped something
    test dx,dx
    jz ext
end:
    ; $-terminate the string
    mov byte[bx+1],'$'
    ; print
    ; dx already contains the location of the string, since that's the
    ; flag value we used for "no swaps"
    mov ah,9
    int 21h
    ret

@_=/./g;a:{for(0..@_-2){@_[$_,$_+1]=@_[$_+1,$_],redo a if uc$_[$_]gt uc$_[$_+1]}}print@_

echo "tThHiIsS" | perl -n sort2.pl

hHiIsStT

$c=count_chars($argv[1]);$r=str_repeat;for($i=64;++$i<91;)echo$r(chr($i),$c[$i]),$r(chr($i+32),$c[$i+32]);

$ php -d error_reporting=0 sign.php qwertyuioplkjhgfdsazxcvbnmQWERTYUIOPLKasdfJHGFDSAZXCVBNM
AaaBbCcDddEeFffGgHhIiJjKkLlMmNnOoPpQqRrSssTtUuVvWwXxYyZz

l=(`mod`32).fromEnum
f=foldr(#)""
e#[]=[e]
e#a@(h:t)|l e<l h=e:a|1<2=h:e#t

FcAZ OcQUC_FIa

a <- cmdline arg, AZ <- string containing uppercase alphabet (implicit)
FcAZ                For each character c in AZ:
           FIa      Filter characters of a on the following lambda function:
      UC_           Uppercase of character...
         Qc         ... is equal to c
     O              Output the resulting list, joined on empty string by default

dlosc@dlosc:~/pip$ pip -e "FcAZ OcQUC_FIax" "HelLo wOrld"
deHlLloOrw