class TV:
    def __init__(self):
        self.channel = 1
        self.volumeLevel = 1
        self.on = False

    def turnOn(self):
        self.on = True

    def turnOff(self):
        self.on = False

    def getChannel(self):
        return self.channel

    def setChannel(self,channel):
        if self.on and 1<= self.channel <=120:
            self.channel = channel

    def getVolume(self):
        return self.volumeLevel

    def setVolume(self,volumeLevel):
        if self.on and 1<= self.channel <= 7:
            self.volumeLevel = volumeLevel

    def channelUp(self):
        if self.on and self.channel<120:
            self.channel =+1

    def channelDown(self):
        if self.on and self.channel>1:
            self.channel =-1

    def volumeUp(self):
        if self.on and self.volumeLevel<7:
            self.volumeLevel

    def volumeDown(self):
        if self.on and self.volumeDown>1:
            self.volumeLevel -=1