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Stack Internal
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Try it online!Try it online!
s=>s.replace(o=/[a-z]+/gi,w=>o[s]>(o[n=w.length]=-~o[n])?0:s=n)|s
Try it online!
s=>s.replace(o=/[a-z]+/gi,w=>o[s]>(o[n=w.length]=-~o[n])?0:s=n)&&s
s=>s.replace(o=/[a-z]+/gi,w=>o[s]>(o[n=w.length]=-~o[n])?0:s=n)&&s|s
