text: Stores left out horizontal and vertical separators
code: var list1 = Array ( s1 . size ) ; var list2 = Array ( s2 . size ) ; var i = 0 ; s1 . forEach ( element => { list1 [ i ++ ] = element ; } ) ; i = 0 ; s2 . forEach ( element => { list2 [ i ++ ] = element ; } ) ;