A day is chosen on which a day poem is written. The constraint is derived from
the day in question: content from what happens over the day and syllable
constraint from the day and month. The month number sets a syllabic constraint
on every first line while the day number sets the same constraint on every
second line. The month number adds a line constraint as well.
The poems which are output from this operation reflect an oscillation of time
measurement: the location in a cyclic year and in a cyclic month is traced
through growth.
