Help for this page
A => A 6.8888 B => B 6.8888 C => C 6.8888 D => D 6.8888
my @letters=qw(A B C D); print ' '; ... } }
A B C D ... B 0.1 6.8 0.1 0.1 C 0.1 0.1 6.8 0.1 D 0.1 0.1 0.1 6.8