VocabularysequencesInputsOutputsWord descriptionOutputs a new sequence with 
seq1 inserted between 
seq2 and 
seq3 of the same type as 
exemplar.
ExamplesUSING: sequences prettyprint ;
"sssssh" "(" ")" SBUF" " surround-as .
SBUF" (sssssh)"
See alsosurroundDefinition