JSFiddle - React, Tailwind, and code Playground
JavaScript
f=n=>n.replace(/.. ?/g,a=>(1+a[1]-a[0])%10)
alert(f(prompt()))
// alert(prompt().replace(/.. ?/g,a=>(1+a[1]-a[0])%10))
// alert(prompt().replace(/.. ?/g,function(a){return(1+a[1]-a[0])%10}))Please Whitelist JSFiddle in your content blocker.
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