String Triangle Pattern

The program must accept a string S as the input. The program must print the desired pattern as shown in the Example Input/Output section.

Boundary Condition(s):
3 <= Length of S <= 100

Input Format:
The first line contains S.

Output Format:
The lines containing the desired pattern as shown in the fixample Input/Output section.

Example Input/Output 1:
Input:
skillrack
Output
s********
ks*******
ski******
liks*****
skill****
rlliks***
skillra**
carlliks*
skillrack

Example Input/Output 2:
Input
hope
Output
h***
oh**
hop*
epoh

a=input().strip()
k=1
for i in range(len(a)):
if(i==0 or i%2==0):
print(a[0:k], end="")
else:
f=a[0:k]
print(f[::-1], end="")
print('*'*(len(a)-k))
k+=1