options:
    items: 1 Diamond Block
    daj: 1 sugar canes

command /trzcina [<text>]:
    trigger:
        argument 1 is "wymien":
            if player has {@items}:
                give {@daj} to the player
                send "&cWymieniles 1 blok diamentu na trzcine cukrowa"
                remove {@items} from player
            else:
                send "&cNie masz 1 bloku diamentow."