free conversion

Must be followed immediately by an ordered tuple (even if it is empty or 1-entry) of natural numbers which is immediately preceded by li; immediately after this tuple (which must be terminated), must be a brivla with at least as many terbri as the maximum of the length of the tuple (the number of entries which it possesses) and the greatest entry. The output of this entire construct is a selbri. The nth entry of the tuple, which is the natural number a_{n}, is the label number of the terbri in the official definition of the selbri which is the nth terbri in the selbri which is produced as a result of this word. So, for example, the tuple (3, 2, 4, 1) means that the first terbri of the new selbri is the third terbri of the selbri in this construct, the second terbri of the new selbri is the second terbri of the selbri in this construct (no change there), third terbri of the new selbri is the fourth terbri of the selbri in this construct, and fourth terbri of the new selbri is the first terbri of the selbri in this construct. This word might be equivalent to certain se xi constructs, but provides an alternative for those who might dislike them.