5. Xiaoming's honor stand has 3 gold medals, 2 silver medals, and 1 bronze medal, arranged from left to right in the order of gold, silver, and bronze. At the sports meet, he won 1 more gold medal and 1 more silver medal, and he needs to place these two medals on the honor stand while ensuring all medals are still arranged from left to right in the order of gold, silver, and bronze. He needs to move at least $\qquad$ of the original medals.
$2$