How to input an interval-structure

In order to input the interval structure of a tone row

1. either a comma-separated list of 11 intervals from the set {1,2,…,11} must be input, if the alphabets A₁ or A₂ are chosen, or a sequence (without commas) of 11 intervals from the set {1,2,…,9,A,B} if the alphabet A₃ is considered. E.g.
   1,1,2,7,9,7,2,2,11,4,11,3 or 11279722B4B3
2. or a part of the interval-structure of a tone row must be input, e.g.
   1,1,2,7 or 1127
   which is an interval-structure of length 4,
3. or a blank-separated list of parts of an interval-structure must be input. E.g.
   1,2,7 7,2,2 9,7,2 or 127 722 972
   which consists in this case of three structures all of length three. Using AND demands that all the different parts must simultaneously occur in the interval structure of a tone row, whereas using OR at least one of these parts must occur in in the interval structure of a tone row.
4. It is also possible to replace the occurrence of an arbitrary interval by a dot ., of arbitrary many intervals by .* which includes also the situation of no intervals, of at least one interval by .+, or of at most one interval by .?. E.g., in order to search for an interval structure where there is exactly one digit between two intervals 6 enter
   6,.,6 or 6.6.

Searching for an interval-structure finds

• the occurrence of the input structure in the interval-structure of a tone row in normal form,
• but also in its retrograde,
• or in its inversion,
• or in its cyclic shifts. E.g. the interval-structure
  11,3,1,1
  is found in a tone row with interval structure
  1,1,2,7,9,7,2,2,11,4,11,3
  even though the four intervals occur at the end and the beginning of this sequence.