05. Square Frame

num = int(input())
for i in range(num):
    output = ''
    for j in range(num):
        if j == 0 or j == num - 1:
            if i == 0 or i == num - 1:
                output += '+' + ' '
            else:
                output += '|' + ' '
        else:
            output += '-' + ' '
    print(output)