Licks 15 - 18 introduce the hammer between two notes. The first note is played, but the second note is produced by hammering on the left hand finger which plays the second note. The letter H and a curved line will indicate when a hammer is used. The following example shows a hammer from the fifth fret to the seventh fret on the fourth string.
Licks 15-18 are in the key of A and are played within pattern one.