At the Blue Level (the fourth level), the stories are longer and introduce more tricky words, which are shown at the end of each book. In addition, all the Jolly Phonics alternative vowel spellings are used to make words like 'day', 'seat', 'night', 'snow', 'few', 'girl', 'straw', 'boy' and 'scowl'. As before, light type is used for those few letters that should not be sounded out, such as the b in 'lamb' (but not in the new tricky words, which should already be familiar without this help).