a, b=map(int,input().split())
i=1
j=1
if a>0 and a<10 and b>0 and b<10:
    for i in range(1,a+1):
        for j in range(1,b+1):
            if (i == 1 or i == a or j ==1 or j == b):
                print('*',end='')
            else:
                print(' ',end='')
            j=j+1
        i=i+1
        print('\r')