JOhI (http://www.lojban.org/en/publications/reference_grammar/chapter18.html)

Indicates that the following mathematical operands (a list terminated by TEhU)
form a mathematical vector (one-dimensional array).

li jo'i paboi reboi te'u su'i jo'i ciboi voboi du li jo'i voboi xaboi
the-number array( one, two ) plus array( three, four) equals the-number array(
four, six) (1,2) + (3,4) = (4,6)

