Designer Door Mat

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    n, m = map(int, input().split())
    c1 = "-"
    c2 = ".|."
    w = "WELCOME"
    leng = n//2
    
    for i in range(leng):
        print( ((2*i+1)*c2).center(m, c1))
        
    print(w.center(m, c1))
    
    for i in range(leng-1, -1, -1):
        print( ((2*i+1)*c2).center(m,c1))