print the elements in the list in sorted order
sort ( $ odd_indexes ) ; for ( $ i = 0 ; $ i < sizeof ( $ odd_indexes ) ; $ i ++ ) echo $ odd_indexes [ $ i ] , " ▁ " ; sort ( $ even_indexes ) ; for ( $ i = 0 ; $ i < sizeof ( $ even_indexes ) ; $ i ++ ) echo $ even_indexes [ $ i ] , " ▁ " ; }