Designer Door Mat

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    N, M =list(map(int, input().split()))
    a=".|."
    
    for i in range(N//2):
        print((a*(2*i+1)).center(M, "-"))
    print("WELCOME".center(M, "-"))
    for i in reversed(range(N//2)):
        print((a*(2*i+1)).center(M, "-"))