Answer:
The letter K and the letter L represent the House of Representatives and the Senate voting on a bill before sending it to the president.
Explanation:
The legislative process begins in one of the houses (senate or house of representatives) and the bill must be approved in both. Then the bill goes to the President of the United States, who can sanction or veto him. In case of veto, the bill returns to Congress with presidential objections. The Congress may review the law, make appropriate changes, and refer again to the President. If the President does not approve it again, Congress may overturn the presidential veto, but only this time if there are two-thirds of the total majority of both Houses together approving the overthrow of the veto.