Typically do not open this with a long minor unless you actually have 22+ HCP so not using the 4LTC rule
Responder bids control where A=2 and K=1
2♦ - 0 Controls
2♥ - 1 Control (Just a King)
2♠ - 2 Controls 2K or 1A
2NT - 3 Controls, 3K or 1A&K
3♣ - 4 Controls, 4K or 2A or 1A&2K
etc