Options:
    none: of player with black stained glass pane named "" to close
    locked: of player with black stained glass pane named "&c未開放" to close
command /custom:
    trigger:
        open chest with 6 row named "武器の選択" to player
        wait 1 ticks
        set {_loop1} to 0
        loop 10 times:
            format slot {_loop1} {@none}
            add 1 to {_loop1}
        if player has permission "sk.ak47":
            format slot 2 of player with wood sword named "&6AK-47" to close then run [execute console command "/scoreboard players set %player% main 7"]
        else:
            format slot 10 {@locked}
            stop
on right click holding book:
    name of held item contains "&e解放の書"
    execute console command "pex user %player% add sk.ak47"