Abbreviate a 2-Word Name (Codewars)

'''


Write a function to convert a name into initials. This kata strictly takes two words with one space in between them.

The output should be two capital letters with a dot seperating them.

It should look like this:

Sam Harris => S.H

Patrick Feeney => P.F

'''
def abbreviateName(name):
    firstLetter = name[0]
    indexOfSpace = -1000
    for i in range(0, len(name)):
        if name[i] == ' ':
            indexOfSpace = i

    secondLetter = name[indexOfSpace+1]
    return (firstLetter.upper() + "." + secondLetter.upper())

# MAIN FUNCTION
name = input("Give me a name: ")
print(abbreviateName(name))