barcode 30->100

function solve(input) {

  let numberOfbarcode = Number(input.shift());

  let pattern = /(?<start>@#+)(?<barcode>[A-Z][a-z\dA-Z]{4,}[A-Z])(?<end>@#+)/;
  let code = '';

  for (const line of input) {
    match = pattern.exec(line);
    code = ''
    if (match) {
      for (const el of match.groups.barcode) {
        if (el.charCodeAt() >= 48 && el.charCodeAt() <= 57) {
          code += el;
        }
      }
      (code == '') ?
        console.log(`Product group: 00`) :
        console.log(`Product group: ${code}`)

    } else {
      console.log(`Invalid barcode`);
    }
  }
}