import string

def print_rangoli(size):
    lowercase = list(string.ascii_lowercase)
    required_char = [lowercase[i] for i in range(size)]
    half_ans = []
    
    for j in required_char:
        ele = ""
        
        for x in range(size-1, lowercase.index(j), -1):
            ele += lowercase[x]
        
        half_ans.append("-".join(ele + j + ele[::-1]))
    
    bottom_half = [h.center(len(half_ans[0]), "-") for h in half_ans]
    top_half = [h.center(len(half_ans[0]), "-") for h in half_ans[-1:0:-1]]
    result = top_half + bottom_half
        
    print(*result, sep='\n')

if __name__ == '__main__':
    n = int(input())
    print_rangoli(n)