def print_rangoli(size):
    letters = [x for x in range(1, size + 1)]
    string = [chr(ord('a') + n - 1) for n in letters]

    if (size == 1):
        print("".join(string))
        return

    string_reversed = "-".join(string)
    string = reversed(string)
    string = "-".join(string)
    
    size *= 2
    
    for x in range(1, size, 2):
        print(f"{string[:x]:->{size - 1}}-{string_reversed[(size - x + 1):]:-<{size - 3}}")
        
    
    for x in reversed(range(1, size - 1, 2)):
        print(f"{string[:x]:->{size - 1}}-{string_reversed[(size - x + 1):]:-<{size - 3}}")