$ perl -Mstrict -Mwarnings -E '
> open my $inFH, q{<}, \ <<EOF or die $!;
> baby blue
> baby pink
> black
> dark blue
> brown
> dark purple
> green
> orange
> hot pink
> light purple
> red
> white
> yellow
> light powder blue
> EOF
> 
> say for
>    map {
>            @$_ > 1
>            ? join q{}, map { substr $_, 0, 1 } @$_
>            : $_->[ 0 ]
>        }
>    map { [ split ] }
>    <$inFH>;'
bb
bp
black
db
brown
dp
green
orange
hp
lp
red
white
yellow
lpb