Winning Ticket [JavaScript]

function winningTicket(input) {
  let tickets = input.split(/[\s]*[,][\s]*/g);
  let pattern = /([\#\@\$\^])\1{5,}/g;

  for (let ticket of tickets) {
    if (ticket.length === 20) {
      let leftPart = ticket.substring(0, ticket.length / 2);
      let rightPart = ticket.substring(ticket.length / 2);

      let leftMatch = leftPart.match(pattern);
      let rightMatch = rightPart.match(pattern);

      if (leftMatch != null && rightMatch != null) {
        leftMatch = leftMatch.join('').toString();
        rightMatch = rightMatch.join('').toString();

        let minLength = Math.min(leftMatch.length, rightMatch.length);

        if (leftMatch && rightMatch) {
          let winFirstHalf = leftMatch.substring(0, minLength);
          let winSecondHalf = rightMatch.substring(0, minLength);

          if (winFirstHalf === winSecondHalf) {
            if (winFirstHalf.length == 10) {
              console.log(`ticket "${ticket}" - ${minLength}${winFirstHalf.substring(0, 1)} Jackpot!`);
            } else {
              console.log(`ticket "${ticket}" - ${minLength}${winFirstHalf.substring(0, 1)}`);
            }
          }
        }
      } else {
        console.log(`ticket "${ticket}" - no match`);
      }
    } else {
      console.log(`invalid ticket`);
    }
  }
}

// winningTicket("Cash$$$$$$Ca$$$$$$sh");
// winningTicket("$$$$$$$$$$$$$$$$$$$$, aabb  , th@@@@@@eemo@@@@@@ey");
// winningTicket("validticketnomatch:(");