C:\test>1133857.pl
AaBbCcDdEeFGHIJaAbBcCdDeEFGHIJ
AaBbCcDdEeFGHIJaAbBcCdDeEFGHIJ
       Rate   Rr   rR   Dd   dD
Rr  85339/s   --  -1% -40% -41%
rR  86543/s   1%   -- -39% -40%
Dd 142186/s  67%  64%   --  -2%
dD 145076/s  70%  68%   2%   --