C:\test>1147022.pl
{ A => [6, 16], B => [7, 14], C => [8, 19], D => [8, 17], E => [10, 20] }

[A A A] => cost:18 value:48
[A A D] => cost:20 value:49
[A A C] => cost:20 value:51
[A A E] => cost:22 value:52
[A D C] => cost:22 value:52
[A D E] => cost:24 value:53
[A C C] => cost:22 value:54
[A C E] => cost:24 value:55
[A E C] => cost:24 value:55
[D C C] => cost:24 value:55
[C A E] => cost:24 value:55
[C D C] => cost:24 value:55
[C C D] => cost:24 value:55
[C C C] => cost:24 value:57
Best: C C C => 57