on inventory close:
    loop player's inventory:
        if {_i} is armour:
            set {_} to level of protection of loop-item
            if {_} >= 4:
                set {_i} to type of loop-item
                remove loop-item from player
                enchant {_i} with protection 3
                add {_i} to player
        else if {_i} is sword:
            set {_} to level of sharpness of loop-item
            if {_} >= 5:
                set {_i} to type of loop-item
                remove loop-item from player
                enchant {_i} with sharpness 4
                add {_i} to player