def test_ab(): assert string_splosion('ab') == 'aab'
def test_the_word_kitten(): assert string_splosion('Kitten') == 'KKiKitKittKitteKitten'
def test_x(): assert string_splosion('x') == 'x'
def test_abc(): assert string_splosion('abc') == 'aababc'
def test_the_word_code(): assert string_splosion('Code') == 'CCoCodCode'