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/./&&!$k{lc$&}&&print$k{lc$&}=$_++&&print$_,$"for/\w+/g
Try it online!Try it online!
/./&&!$k{lc$&}&&print$k{lc$&}=$_,$"for/\w+/g
Try it online!
/./&&!$k{lc$&}++&&print$_,$"for/\w+/g
