1. a b B c A C <- bad
2. a b B A c C <- ok
3. a b c C B A <- ok
4. a b A B c C <- bad
5. a b B c C A d e E D <- ok
6. a A b B c C <- ok


##</code><code>##

 %k = ( 0 => 8,
        3 => 5,
        7 => 9,
        10 => 100,
        11 => 99, 
        15 => 25,
        16 => 26,
        17 => 27,
        35 => 40,
        36 => 39,
        37 => 38,
        60 => 80,
        65 => 75, 
        66 => 76,
        67 => 74);