function solve(input) {
  let count = Number(input.shift());
  let pattern = /[\@{1}][\#{1,}]+([A-Z][A-Za-z0-9]{4,}[A-Z]+)[\@{1}][\#{1,}]+/;
  let productPattern = /[A-Za-z]/g;
  let digitPatter = /\d/gi;
  for (let i = 0; i < count; i++) {
    let code = input.shift();
    let isTrue = pattern.test(code);
    let product = "";
    let productGroup = "";
    if (isTrue) {
      for (let k = 0; k < code.length; k++) {
        let tryIndex = code[k];
        if (productPattern.test(tryIndex)) {
          product += tryIndex;
        }
        if (tryIndex >= 0 && tryIndex <= 9) {
          productGroup += tryIndex;
        }
      }
      if (productGroup == "") {
        productGroup = "00";
      }
      console.log(`Product group: ${productGroup}`);
    } else {
      console.log("Invalid barcode");
    }
  }
}