def print_brett(brett): # oppgave 2g
    N = len(brett)
    for y in range(N):
        s=''
        for x in range(N):
            if brett[y][x]==1:
                s=s+'.'
            elif brett[y][x]==0:
                s=s+'O'
            elif brett[y][x]==5:
                s=s+'*'
        print s