class canvas:
    def __init__(self,width,height):
        self.width=width
        self.height=height
        self.data=[['']*width for i in range(height)]
    def setpixel(self,row,col):
        self.data[row][col]='*'
    def getpixel(self,row,col):
        return self.data[row][col]
    def display(self,):
        print "\n".(join([""]))