python coding question. Please help!

(5)

Collect Digits

Given a string of any length, extract the numbers (digits) and print them on one line without spaces.

Hint 1: one way to do this is to start with an empty string, concatenate each digit onto the string and at the end simply print the string.

Hint 2: isdigit() is your friend.

For example, given this string:

some 1! likes 2 put 14 digits, in 3 strings

The output will be

12143

Use the input statement in the skeleton:

s = input("Input a string: ")

(6)

String Methods.

Given a name in the format

lastname, firstname

where there is exactly one comma and exactly one space

transform the name into the format

first_initial. lastname

where

* first_inital and lastname are both capitalized

* there is exactly one period and space following the first_initial

For example, given s =

ghandi, mahatma

the output will be

M. Ghandi

Use the input statement in the skeleton code:

name = input("Input a name: ")