"abc".stringify($i)

##</code><code>##

concat( "abc" stringify(i) )

##</code><code>##

 1 padsv[$x]             ->  2
 2 padsv[$y]             ->  3
 3 concat_if_overloaded  ->  11 if overloaded, 4 otherwise
 4 swap_stack[0,1]       ->  5
 5 get_magic             ->  6
 6 stringify             ->  7
 7 swap_stack[0,1]       ->  8
 8 get_magic             ->  9
 9 stringify             -> 10
10 concat_prestringified -> 11