warmup_1.front3.py

# Given a string, we'll say that the front is the first 3 chars of the string.
# If the string length is less than 3, the front is whatever is there. Return a
# new string which is 3 copies of the front.

# front3('Java') → 'JavJavJav'
# front3('Chocolate') → 'ChoChoCho'
# front3('abc') → 'abcabcabc'

def front3(str):
    front_index = 3
    return str[:front_index] * 3