def designDoorMatList(n , m):
    c_char = ".|."
    o_char = "-"
    res = ""
    res_list = []
    for i in range(1,int(n+1/2)):
        if i%2 != 0 :
            q = (m - len(c_char)*i)/2
            res = o_char*int(q) +  c_char*i + o_char*int(q)
            res_list.append(res)
    p1 = ""
    for j in res_list:
        print(j)
    print(o_char*int((m-7)/2) + "WELCOME" + o_char*int((m-7)/2))
    res_list.reverse()
    for j in res_list:
        print(j)   
        
input_list  = list(map(int, input().split()))
N = input_list[0]
M = input_list[1]
designDoorMatList(int(N), int(M))