The snacker produces dominosparks, which can be used for a p36 toad hassler. In other cases they may be rather inaccessible due to the eaters. By putting more pentadecathlons, the snacker is extensible as shown below, whose spark is more accessible. This leads to the first period-18 oscillator, 117P18. A more accessible domino spark can also be obtained using a different oscillator shown below.