python输入一串英文字符, 程序依次在相邻位置插入一个空格, 逐行输出.

程序运行示例如图：

word = input('Enter a string: ')

length = len(word)

for i in range(length):
    if i == 0:
        continue
    print(word[0:length-i]+' '+word[length-i:length])
    if i == length-1:
        print('-----------')
for i in range(length):
    if i == 0:
        continue
    print(word[0:i]+' '+word[i:length])