DB<129> @a=(3,1,3)
 => (3, 1, 3)
 
  DB<130> @a ~~ [reverse @a]
 => 1
 
  DB<131> @a ~~ [3,1,3]
 => 1
 
  DB<132> @a=1..3
 => (1, 2, 3)
 
  DB<133> @a ~~ [reverse @a]
 => ""