I have written a python script which gets all the word starting from letter specified. But when i run it the program gives some words then crashes with giving error-'IndexError :string index out of range.

Question

My script:

a=open("textfile.txt",'r+','encoding="ANSI")

word_starts_with=input("Enter any letter")

for line in a:

       word=line.strip()

      if word[0] ==word_starts_with:

           print(word)