According to CNN
"The US aircraft that have landed on South Korea include six F-22s, six F-35s, six EA-18Gs," the official said. "More than 10 F-15Cs and F-16s have also been deployed for the (Vigilant Ace 18) drill."
These aircraft will stay in South Korea for the week. They will be joined by more F-35Bs -- the Marine Corps version, based in Japan -- B-1 bombers and E-3 airborne warning and control system (AWACS) aircraft that will fly in to join the wargames.
Their photo shows a pair of 3 wg "AK" Raptors