[Python] How to fix Python doesn't print all my string

I write some code, I want to print everything, but in one place the last character is not printed

a = input("Input Text\n")
b = []
i = 0
while i < len(a):
b.append(a[0:i])
i = i+1

for c in b:
print(c)
temp = ''
for i in range(-1, -len(b), -1):
temp = b
print(temp)


Example:

input text = 'abc', it will print this

a, ab, ab, a
​

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