rangoli

def print_rangoli(size):
    lineWidth = 3 + (4*(size-1)) - 2
    chars = []
    for i in range(0, size):
        chars.append(chr(96+size-i))
    counter = 0   
    s = ""
    sarr = []
    for val in chars:
        if counter == 0 :
            S = val.center(lineWidth, "-")
            sarr.append(S)
            print(S)
            counter += 1 
        else :
            s = val
            for i in range (counter, 0, -1):
                s = chars[i-1] + "-" + s + "-" + chars[i-1]
            S = s.center(lineWidth, "-")
            sarr.append(S)
            print (S)
            counter += 1
    
    sarr.pop()
    for val in reversed(sarr):
        print(val)