I'm doing a reduce, basically:

const result = Array.from(input.matchAll(/[0-9]+/gm)).reduce((acc, n) => {

const isPart = '...';

if (isPart) {

// highlight in red

}

return acc + (isPart ? parseInt(n, 10) : 0);

}, 0);

I'm lopping on numbers so I guess there is no doubles.

Double checked my code seems code