class Lampe:
    
    def actions(self):
        return(['appuyer','rien'])

    def etats(self):
        return(['allume','eteint'])
            
        
    def transition(self,s,a):
        if (a=='rien'):
            return(s)
        if (a=='appuyer'):
            if (s=='allume'):
                return('eteint')
            if (s=='eteint'):
                return('allume')
        return('erreur')
            

    def recompense(self,s,a,sarr):
        if (s=='eteint') and (a=='appuyer'):
            return(10)
        return(0)