Designer Door Mat

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    n, m = map(int, input().split())
    for i in range(n//2) :
        print((('.|.'*(1+(2*i))).center(m,'-')))
    print('WELCOME'.center(int(m),'-'))
    for i in range(n//2, 0, -1) :
        print((('.|.'*(1+(2*(i-1)))).center(m,'-')))