Python program to extract a specified number of digits from a specified number of digits.

main.py

"""
Input:
1234567891
5
3

Output:
567
"""
string = int(input())
start_str = int(input())
digit = int(input())
string_digit = int(len(str(string)))

a = int(string / 10 ** (string_digit - start_str - digit + 1))

b = int(a / 10 ** digit)
b  = b * 10 ** digit

result = a - b

print(result)