vector< vector<char> > v;
...
// I've filled the list by now:
// "v[0]" contains the vector of elements 'b','b'
// "v[1]" contains the vector of elements 'b','a'
// "v[2]" contains the vector of elements 'a','a'

// "v[0]" contains the vector of elements 'a','a'
// "v[1]" contains the vector of elements 'b','a'
// "v[2]" contains the vector of elements 'b','b'

% rc4 hexkey < input > output
#define S ,t=s[i],s[i]=s[j],s[j]=t /* rc4 hexkey <file */
unsigned char k[256],s[256],i,j,t;main(c,v,e)char**v;{++v;while(++i)s[ 
i]=i;for(c=0;*(*v)++;k[c++]=e)sscanf((*v)++-1,"%2x",&e);while(j+=s[i]
+k[i%c]S,++i);for(j=0;c=~getchar();putchar(~c^s[t+=s[i]]))j+=s[++i]S;}

#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>

using namespace std;

// Uncomment if you get errors
//#define NO_KOENIG

#ifdef NO_KOENIG
namespace std {
#endif
  template <typename T>
  ostream& operator<< ( ostream& out, const vector<T>& v )
  {
    copy ( v.begin(), v.end(), ostream_iterator<T> ( out, " " ) );
    return out;
  }
#ifdef NO_KOENIG
}
#endif

int main()
{
  char a[] = {'b','b'};
  char b[] = {'b','a'};
  char c[] = {'a','a'};
  vector<vector<char> > v;

  v.push_back ( vector<char> ( a, a + 2 ) );
  v.push_back ( vector<char> ( b, b + 2 ) );
  v.push_back ( vector<char> ( c, c + 2 ) );

  sort ( v.begin(), v.end() );
  copy ( v.begin(), v.end(), ostream_iterator<vector<char> > ( cout, "\n" ) );
}

v.push_back ( vector<char> ( a, a + 2 ) );

( a, a + 2 )

% rc4 hexkey < input > output
#define S ,t=s[i],s[i]=s[j],s[j]=t /* rc4 hexkey <file */
unsigned char k[256],s[256],i,j,t;main(c,v,e)char**v;{++v;while(++i)s[ 
i]=i;for(c=0;*(*v)++;k[c++]=e)sscanf((*v)++-1,"%2x",&e);while(j+=s[i]
+k[i%c]S,++i);for(j=0;c=~getchar();putchar(~c^s[t+=s[i]]))j+=s[++i]S;}