say "lc: out=", pp( lc "A","B" );
print "mylc: "; say " out=", pp( mylc "A","B" );
print "mylc2: "; say " out=", pp( mylc2 "A","B" );
# lc: out=("a", "B")
# mylc: in="A" out=("a", "B")
# mylc2: in=("A", "B") out="a"